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The short version
Construction has always run on flexible labour. But "flexible" has become code for "no rights." If you turn up when told, work where told, use their gear, wear their PPE, and can't send someone else in your place -- you're probably not genuinely self-employed, whatever the paperwork says. The law now recognises a middle category called a worker, and two Supreme Court decisions have made clear that what actually happens on the ground beats what's written in the contract. That matters, because workers get rights that the genuinely self-employed don't.
Why this matters on site
The construction industry is the UK's largest employer of people in the grey zone between employment and self-employment. Agencies, umbrella companies, labour-only subcontract arrangements, and now digital platforms all create working relationships where the paperwork says one thing and the reality says another.
If you've ever been told you're "self-employed" but you couldn't choose your own hours, couldn't turn work down without consequences, couldn't send a mate in your place, and had to follow the gaffer's instructions all day -- you were almost certainly a worker at minimum, and possibly an employee. That's not your opinion. That's the law, confirmed at the highest court in the land.
The three-tier system
UK employment law currently splits people into three categories under s230 of the Employment Rights Act 1996:
| Status | What it means | Key rights |
|---|---|---|
| Employee | Contract of employment -- full mutual obligations, control, integration into the business | Everything: unfair dismissal, redundancy pay, notice periods, maternity/paternity, flexible working, full discrimination protection |
| Worker (limb (b)) | Personally performs work under a contract, but not in business on their own account | National Minimum Wage, paid holiday (5.6 weeks), rest breaks, pension auto-enrolment, whistleblowing protection, discrimination protection |
| Self-employed | Genuinely in business on their own account -- free to substitute, set own price, take own commercial risk | Very few employment protections. Health and safety duties still apply. |
The gig economy fight is almost entirely about the line between worker and self-employed. If you're a worker, you get a meaningful package of rights. If you're self-employed, you get almost nothing.
The landmark cases -- and what they mean for you on site
Uber BV v Aslam [2021] UKSC 5 -- Supreme Court
Uber drivers were classed as self-employed under their contracts. The Supreme Court unanimously held they were workers. The key principles:
- The written contract is not the starting point. Worker status is a question of statutory interpretation, not contractual interpretation.
- Look at the reality, not the label. The purpose of the legislation is to protect vulnerable people in a position of subordination and dependence.
- The greater the degree of control, the more likely you're a worker. Uber set the fares, set the route, penalised drivers for rejecting rides, and handled the customer relationship. The drivers had no real autonomy.
- Working time includes being available. Drivers were "working" whenever logged into the app, in territory, and ready to accept rides -- not just when carrying passengers.
On site translation: If you're logged onto an agency app or waiting in a yard for allocation and can't leave without consequence, that time may count as working time.
Pimlico Plumbers v Smith [2018] UKSC 29 -- Supreme Court
A plumber worked for Pimlico for over five years under a contract calling him a self-employed contractor. The Supreme Court held he was a worker because:
- He was required to work a minimum 40-hour week
- He had to wear a uniform and drive a branded van with a tracker
- He couldn't send a substitute freely -- Pimlico controlled who did the work
- Post-termination restrictions stopped him working as a plumber in Greater London for 3 months
- Pimlico was not his "client or customer" -- he was integrated into their operation
On site translation: If you wear their branded PPE, drive their van, work their hours, and can't freely substitute -- you're probably a worker regardless of what your "subcontract agreement" says.
Autoclenz v Belcher [2011] UKSC 41 -- Supreme Court
Car valeters had contracts with substitution clauses and no mutuality of obligation -- the classic "self-employment" wording. The Supreme Court held the contracts were shams that didn't reflect reality. The valeters were employees.
On site translation: A contract clause saying "you can send a substitute" means nothing if, in practice, you can't. Tribunals look at what actually happens, not what the paperwork says.
The construction gig economy -- what it looks like in practice
| Arrangement | Common in | Status risk |
|---|---|---|
| Agency PAYE | General labour, trades on commercial sites | You're employed by the agency -- worker rights at minimum, often employee |
| Umbrella company | Labourers, trades on bigger sites | You're employed by the umbrella -- full employment rights, but check the terms |
| Labour-only subcontract (CIS) | Smaller contractors, domestic builders | The highest-risk grey zone -- often labelled self-employed but working exactly like employees |
| Platform/app work | Emerging -- task-based platforms, labour hire apps | Depends entirely on the degree of control the platform exercises |
| "Self-employed" on one site, for one contractor, full-time | Everywhere in construction | Almost certainly a worker, quite possibly an employee |
The biggest problem in construction isn't Uber-style app platforms -- it's the traditional labour-only subcontract model where someone works full-time for one contractor, on one site, under full supervision, using the contractor's materials, and gets paid through CIS with a UTR number. The label says self-employed. The reality says otherwise.
What workers actually get
If you're found to be a worker (not just self-employed), you gain these rights immediately:
- National Minimum/Living Wage -- currently £12.21/hour for 21+
- 5.6 weeks' paid annual leave -- that's 28 days for a 5-day worker, pro-rata for irregular hours
- Rest breaks -- 20 minutes if working 6+ hours, 11 hours between shifts, 24 hours off per week
- Pension auto-enrolment -- employer must enrol you and contribute
- Protection from unlawful deductions from wages
- Whistleblowing protection -- can't be victimised for raising health and safety concerns
- Discrimination protection -- Equality Act 2010 applies to workers
- Right to an itemised payslip
What workers don't get (these are employee-only): unfair dismissal protection, statutory redundancy pay, statutory notice periods, right to request flexible working, maternity/paternity pay (though statutory maternity pay has separate rules).
Agency workers -- the 12-week rule
If you work through an agency, the Agency Workers Regulations 2010 give you additional rights after 12 continuous weeks in the same assignment with the same hirer:
- Same basic pay as someone recruited directly for the same role
- Same overtime rates, shift allowances, and holiday entitlement
- Access to the same facilities (canteen, parking, transport between sites)
Watch out for: Employers rotating you between sites or breaking your assignment just before 12 weeks to avoid triggering these rights. The regulations include anti-avoidance provisions -- if a series of assignments is structured to prevent you reaching the 12-week threshold, a tribunal can see through it.
ERA 2025 -- where this is heading
The Employment Rights Act 2025 doesn't merge the worker and employee categories -- that was considered but not included in the Act itself. However:
-
Consultation on a single "worker" status is expected, which would collapse the three-tier system into two tiers: worker or self-employed. This would extend unfair dismissal, redundancy pay, and other currently employee-only rights to everyone who isn't genuinely in business on their own account.
-
Zero-hours protections now apply to workers and agency workers -- guaranteed hours offers after a reference period, reasonable notice of shifts, compensation for cancelled shifts.
-
Day-one sick pay -- SSP becomes available from day one of absence for all workers, with the lower earnings limit removed (from April 2026).
-
Fair Work Agency -- new enforcement body with powers to investigate and act on minimum wage, holiday pay, and other worker rights across sectors including construction.
The direction of travel is clear: the grey zone is narrowing. Arrangements that currently survive because nobody challenges them are going to face more scrutiny.
How to work out where you stand
Run through this honestly:
| Question | If yes... |
|---|---|
| Do you have to do the work personally -- can't freely send someone else? | Points towards worker/employee |
| Does the contractor set your hours, start times, break times? | Points towards worker/employee |
| Do you work predominantly for one contractor at a time? | Points towards worker/employee |
| Do you use their tools, materials, or equipment? | Points towards worker/employee |
| Do you wear their uniform, PPE with their branding, or carry their ID? | Points towards worker/employee |
| Are you paid a fixed hourly/daily rate with no negotiation? | Points towards worker/employee |
| Can you be disciplined, moved between tasks, or sent home? | Points towards worker/employee |
| Do you take genuine financial risk -- quoting for jobs, carrying liability, covering your own defects? | Points towards self-employed |
| Can you work for multiple clients simultaneously in practice? | Points towards self-employed |
| Do you provide your own significant equipment and materials? | Points towards self-employed |
If most of your answers fall in the top group, the contract calling you self-employed probably doesn't reflect reality -- and a tribunal would likely agree.
What to do
-
Know the three categories. Employee, worker, self-employed. Your rights depend entirely on which one you actually are -- not which one the paperwork says.
-
Look at the reality, not the label. Uber, Pimlico, and Autoclenz all confirm: tribunals pierce the paperwork and look at what actually happens on the ground.
-
If you're a worker, claim your rights. Holiday pay, minimum wage, rest breaks, pension -- these aren't favours. They're law.
-
Keep evidence of the real arrangement. Texts telling you when to be on site, rotas, photos of branded PPE, the fact you can't substitute -- all of this matters if it comes to a tribunal.
-
Challenge one-sided final account agreements. If you're asked to sign something on leaving that waives claims, check what you're giving up (see guide 3.18).
-
Watch the ERA 2025 consultation on single worker status. If it proceeds, the grey zone collapses -- and millions of construction workers labelled self-employed will gain full employment rights.
-
Get advice before it's too late. Tribunal time limits apply (currently 3 months, moving to 6 months from October 2026 -- see guide 3.19). Don't sit on a good claim.
What to do next
- Run through the status checklist in this guide honestly -- if most answers point to worker or employee, the "self-employed" label probably doesn't reflect reality.
- If you're a worker, claim your rights now: holiday pay, minimum wage, rest breaks, and pension auto-enrolment are law, not favours.
- Keep evidence of the real arrangement: texts about start times, rotas, branded PPE, the fact you can't substitute.
- Watch the ERA 2025 consultation on single worker status -- if it proceeds, the grey zone collapses and millions gain full employment rights.
- Don't sit on a good claim -- tribunal time limits apply (currently three months, moving to six months from October 2026).
Sources
- Employment Rights Act 1996 s230 -- definitions of employee and worker
- Uber BV v Aslam [2021] UKSC 5 -- Supreme Court judgment on worker status
- Pimlico Plumbers Ltd v Smith [2018] UKSC 29 -- Supreme Court on plumber's worker status
- Autoclenz Ltd v Belcher [2011] UKSC 41 -- sham contracts and true relationship
- Lewis Silkin -- single worker status and ERA 2025 (March 2026)
- ACAS -- rest breaks and working time rights
- GOV.UK -- holiday entitlement for workers
- Gangmasters and Labour Abuse Authority -- worker rights
- Biscoes Solicitors -- Agency Workers Regulations guide
- UNISON -- ERA 2025 FAQ (February 2026)
This guide is general information about employment status and worker rights in England and Wales. It is not legal advice. If you believe you've been incorrectly classified as self-employed and denied rights, get independent legal advice from a qualified solicitor, your trade union, Citizens Advice, or a Law Centre. Employment status is fact-specific -- your situation may differ from the cases described. Laws change; verify current positions with a regulated professional. SiteKiln is not a law firm and accepts no liability for actions taken based on this content.
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