The United Kingdom enacts statutory four-day workweek legislation before 2030.
Extensive UK company trials of a four-day week have shown positive productivity and wellbeing outcomes. Resolution requires an Act of Parliament setting the statutory full-time working standard to four days or 32 hours without pay reduction.
Across 6 frontier models answering independently, the panel has all but ruled it out: the median is 8%.
They broadly agree, 8 points between Grok at 12% and Claude at 4%.
Nothing is settled until 29 Oct 2031, when the outcome is checked against sources and every number above gets a permanent score.
What each one said
-
GrokxAI
A governing party must choose to legislate a 20% paid-hours cut despite employer costs.
- Labour (in office to ~2029) omitted it from 2024 manifesto and has prioritised growth; a bill needs introduction, Commons/Lords passage and assent by Dec 2029.
- UK has enacted no comparable statutory hours cut since the 1998 NMW; 4-day trials are voluntary, small and self-selected so do not shift the base rate.
- A 2028 manifesto pledge or government time for a union-backed bill would be the clearest upward revision.
12% -
DeepSeekDeepSeek
No governing party has put a four-day week in a manifesto, so this needs a political rupture before 2030.
- Labour's 2024 manifesto promised flexible working and a right to disconnect, not a statutory 32-hour week, and no bill is before Parliament.
- The 2022-23 UK pilot covered only 61 firms and 2,900 workers, all voluntary; statutory change would face Treasury cost concerns and CBI pushback.
- Comparable base rate is low: no major economy has legislated a general four-day week, though Belgium's 2022 right-to-request law shows the weaker version that passes.
12% -
GPTOpenAI
It turns on whether a post-2029 government makes a 32-hour, no-pay-cut standard a priority rather than expanding flexible-work rights.
- Parliament would need to pass primary legislation after consultation, fiscal costing and employer opposition, likely across multiple sessions.
- UK precedent is gradual: the Working Time Regulations set a 48-hour cap in 1998, but no government has legislated a shorter full-time norm.
- Positive trials aid advocacy but are voluntary and selective; a manifesto commitment from the next government would sharply raise the odds.
9% -
GeminiGoogle
Mandating a 32-hour week without pay cuts requires rare legislative radicalism that Starmer's Labour explicitly avoids.
- Labour's Employment Rights Act focuses on flexible working requests, not mandatory hours reduction, and ministers actively disavow pay mandates.
- Major European statutory hours cuts, like France's Aubry laws in 1998-2000, took years of planning and face fierce employer opposition today.
- A catastrophic economic slump forcing work-sharing or a sudden left-wing coup in Labour before the next election is the only real path.
6% -
ClaudeAnthropic
No major UK party backs a mandatory statutory 4-day week; trials remain voluntary, not legislative policy.
- Labour government under Starmer has explicitly ruled out mandating a 4-day week nationally, favoring voluntary flexibility.
- Passing an Act of Parliament restructuring full-time hours without pay cuts would require major cross-party consensus and business buy-in absent today.
- Base rate for sweeping labor-law mandates like this passing within a ~4-year window in UK is very low given no bill is even drafted.
4% -
QwenAlibaba
No major UK party has committed to this; Labour explicitly dropped it from their 2024 manifesto.
- Labour's Employment Rights Act addressed zero-hours and dismissal but deliberately excluded a four-day mandate, signaling no appetite.
- No comparable economy has ever legislated a 32-hour statutory standard; even Iceland's trials led only to sectoral public-sector shifts, not universal law.
- A change of mind would require either a new government elected on this platform (next election ~2029) or a dramatic Labour reversal—both near-impossible in this window.
4%
6 of 6 models answered · 8 points between the highest and lowest. None was shown the market price.
Question sourced from a news sweep on 30 Oct 2026. Forecast by google/gemini-3.8-flash, anthropic/claude-sonnet-5, openai/gpt-5.6-terra, x-ai/grok-4.6, deepseek/deepseek-v4.1-flash, qwen/qwen3.8-max-0902 via OpenRouter.