Strathern entered Parliament by delivering Labour one of its most symbolic victories before the 2024 general election. He overturned the Conservatives in Nadine Dorries's former Mid Bedfordshire seat at the October 2023 by-election. Boundary changes then placed his home in the new Hitchin constituency, where he defeated former Treasury minister Bim Afolami by 8,109 votes in 2024.

Labour's leadership moved him inside quickly. Three months after the by-election, he became a joint parliamentary private secretary to Rachel Reeves and Ed Miliband, connecting the party's Treasury and climate teams while Labour was retreating from its £28 billion green-investment pledge. He remained a Treasury aide after Labour entered government and was kept in that role under John Healey when Andy Burnham changed chancellors in July 2026.

That record makes Strathern an insider rather than a rebel. His influence has generally been exercised through private lobbying and government access, not public confrontations with the leadership.

What he stands for

Climate action is his clearest ideological commitment. Before entering Parliament, he took part in a Greenpeace demonstration against the Conservatives' Public Order legislation. There was no direct action or arrest, but he did not disown the protest when Conservatives demanded that Labour remove him as a candidate.

In Parliament, he has argued for climate investment as economic policy rather than sacrifice. His other recurring themes are rural households, family farms and the charges imposed on owners of new-build homes whose roads and communal areas remain privately managed.

What he delivered

Strathern can claim a share of one significant government retreat. He was among a group of rural Labour MPs who lobbied ministers over the proposed inheritance-tax treatment of farms. The government subsequently raised the allowance receiving full agricultural and business property relief from £1 million to £2.5 million, sharply reducing the number of estates expected to be affected. The change was collective, driven by farmers, opposition pressure and several Labour MPs, but reporting identified Strathern among the backbenchers who built the case inside government.

His most distinctive personal campaign concerns "fleecehold" estates. In 2025 he introduced a Housing Estates Bill proposing management rights for freeholders, minimum standards and eventual council adoption of communal facilities.

The government later consulted on mandatory standards, resident control and stronger protection against unreasonable charges. That was movement in his direction, but not solely his achievement: it also implemented parts of the inherited Leasehold and Freehold Reform Act and followed Competition and Markets Authority recommendations. The reforms remained proposals rather than completed protection, and Strathern's own Bill had not become law.

Capability

Strathern has demonstrated more political ability than his short service might suggest. He won two difficult seats, gained and retained Treasury access, converted rural pressure into a measurable tax concession and developed a neglected housing problem into a government consultation.

The limits are equally clear. His strongest achievement was collective, while his signature housing campaign had not produced legislation by the assessment date. He is a capable internal operator and increasingly effective campaigner, but has not yet proved that he can deliver a major reform from proposal to implementation.