Dr Kieran Mullan's career poses a question that is becoming increasingly common in British politics: what should voters make of politicians who possess genuine expertise in a failing system but leave little evidence that they changed it?

Kieran John Mullan was born on 6 June 1984 in Birmingham. He grew up in social housing, the son of a nurse and a policeman. He attended King Edward VI Five Ways, one of Birmingham's most prestigious grammar schools, and studied medicine at the Leeds School of Medicine. He is openly gay, and has said he entered politics partly because "gay people should be able to walk hand in hand with their partner without being beaten".

He worked across emergency medicine, psychiatry and public health over more than a decade, and remains registered with the GMC. In 2020, while serving as an MP, he returned to the NHS frontline as a volunteer during the Covid pandemic. He also served as a volunteer Special Constable, following his father into policing. An MP who went back to working in A&E during a pandemic and volunteered as a police officer has more frontline credibility than a generic health commentator.

He was elected MP for Crewe and Nantwich in 2019 with 53.1 per cent of the vote and a majority of 8,508, defeating Labour's Laura Smith. He served on the Education Committee and was appointed PPS to Health Secretary Steve Barclay in May 2023. Boundary changes then made Crewe and Nantwich unwinnable for the Conservatives. He did not seek renomination there, and Labour's Connor Naismith took the seat with a majority of 9,727.

He was selected for Bexhill and Battle through an emergency selection on 3 June 2024, just one month before the election, succeeding Huw Merriman, the former Rail Minister and Transport Committee chair. He won on 16,186 votes, 34.2 per cent, with a majority of 2,657, or 5.6 per cent. The Liberal Democrats took 28.6 per cent and Reform 19.9 per cent. That is not a comfortable hold. It is a three way contest in which the Liberal Democrats are within striking distance.

He was appointed Shadow Minister for Transport from July to November 2024, then Shadow Minister for Justice under Kemi Badenoch. In the Justice role he has advocated stricter sentencing for violent and sexual offences and focused on victims' rights.

His first term coincided with one of the most turbulent periods in NHS history. Waiting lists reached record levels, mental health services faced growing demand, and public satisfaction with the NHS deteriorated. None of these failures were created by Mullan, and he returned to A&E during the worst of it, which is more than most MPs did. The harder question is whether his parliamentary work materially altered the trajectory. The evidence is limited. He was a visible Conservative voice on health and held a parliamentary private secretary role at the Department of Health, but he did not produce a major reform, legislative achievement or structural change bearing his fingerprints.

At 42, his career has moved from health to law and order. Whether the Justice role produces a serious Conservative sentencing and victims' agenda, or whether the medical credentials remain the most interesting thing about a politician who never fully deployed them, is the question his career must still answer.