Mary Kelly Foy entered Parliament in 2019 after winning Labour's selection in the City of Durham. The contest exposed tensions over central control of selections: some local left-wing members objected when a favoured candidate was excluded from the longlist. Foy nevertheless emerged as the union-backed socialist candidate and retained the seat at the general election.

She joined the Socialist Campaign Group and supported Rebecca Long-Bailey for the Labour leadership in 2020. Her place in Parliament has therefore rested on an identifiable Labour-left base rather than advancement under Keir Starmer. She won again in 2024 with 19,131 votes and a majority of 11,757.

Foy briefly served as parliamentary private secretary to shadow employment secretary Andy McDonald. She resigned in October 2020 so that she could vote against the Covert Human Intelligence Sources Bill, which authorised undercover agents to participate in criminal conduct. Labour had ordered its MPs to abstain. The resignation cost her a junior position but established that she was prepared to put civil-liberties objections above advancement.

Her standing improved under Andy Burnham when, in July 2026, she became a parliamentary private secretary in the housing team. It brought the Socialist Campaign Group into government, but a PPS post carries no departmental authority and the appointment was too recent to produce a completed record.

What she stands for

Foy's politics are those of the trade-union left: stronger employment rights, redistributive welfare, public services and resistance to private interests in health provision. Her alliances with Unison, Unite and the Fire Brigades Union are matched by her voting behaviour.

That independence became particularly clear over Labour's 2025 welfare legislation. She opposed restrictions on disability benefits at second reading and again at third reading, joining rebellions of 49 and 47 Labour MPs respectively. Backbench resistance forced the government to remove its immediate Personal Independence Payment restrictions and accept further safeguards, although the remaining Universal Credit legislation still passed. Foy contributed to that retreat but cannot claim it as an individual victory.

Public health is another consistent interest. She has argued for stronger tobacco regulation and for the tobacco industry to finance measures dealing with the harm caused by smoking. As co-chair of the all-party group on smoking and health, she backed a proposed industry levy estimated by campaigners to raise £700 million annually. That remained a proposal, not money collected or a programme delivered.

What she actually delivered

Foy's most substantial achievement is the Education and Training (Welfare of Children) Act 2021. She introduced the private member's bill and took it through Parliament with government support. It received Royal Assent on 29 April 2021.

The Act closed a safeguarding gap affecting publicly funded post-16 education in England. Duties already applying to schools and colleges were extended to 16-to-19 academies, specialist post-16 institutions and independent providers delivering apprenticeships or T-level training. Those organisations must follow statutory safeguarding guidance, while the education secretary must make compliance a condition of public funding.

That is a narrow reform, but it is real law with a defined group of children covered by protections that previously did not apply consistently. Few backbench MPs turn a private member's bill into an Act, particularly during their first Parliament.

The rest of her record is more heavily weighted towards campaigning. Work on dentistry, tobacco control, firefighter safety and child poverty has raised issues but produced few further changes attributable personally to her. Proposed restrictions on free vape samples and a higher tobacco-purchasing age did not become law through her own amendments.

Controversies and corrections

The 2021 Labour campaign gathering held at Foy's constituency office became part of the "Beergate" investigation involving Starmer and Angela Rayner. Durham Constabulary reconsidered the event but concluded in July 2022 that no fixed-penalty notices would be issued and that no further action would be taken. Foy was therefore not found to have broken the Covid rules.

A more serious question about transparency arose in 2025 over her relationship with Matt Wrack, the former Fire Brigades Union general secretary. Foy had promoted FBU causes in Parliament; the union donated £2,000 towards her re-election and supplied a member of staff, while the relationship had not appeared in her register. She contacted the Parliamentary Commissioner for Standards for guidance. No published adverse standards finding has been established. Her current parliamentary register contains no interests.

Capability judgement

Foy has proved herself an effective left-wing backbencher. She has sacrificed a party position over principle, contributed to a rebellion that forced welfare concessions and, most importantly, converted a specific safeguarding proposal into law.

Her record is narrower than her campaigning output suggests. She has not controlled a public body or delivered a major spending programme, and most of her causes remain advocacy rather than completed change. The 2021 Act nevertheless provides stronger evidence of practical legislative ability than many backbench MPs can offer.