Assisted dying dominated McNally's most significant parliamentary moment to date. On 20 June 2025, he broke with his party on every division related to the Terminally Ill Adults (End of Life) Bill, voting against the bill at Third Reading and opposing amendments that would have expanded its scope. He backed New Clause 16, which would have barred applications driven by fear of being a burden, disability unrelated to terminal illness, or inadequate access to care — placing him firmly in the restrictive camp on this conscience vote. Beyond Westminster, he has run a visible local operation: campaigning against the closure of Bellshill's Bank of Scotland branch, hosting a jobs fair, and welcoming a North Lanarkshire AI growth zone announcement alongside senior government figures.
A 97% party-line voter in most areas, McNally diverges sharply from Labour colleagues on assisted dying — voting 47 percentage points below his party's average on assisted-dying access — and scores notably lower on immigration control and armed forces welfare votes. He participates in around four in five divisions, close to the Commons average. His 74 speech contributions span economy and jobs most heavily, followed by defence, health, and cost-of-living — a mix that reflects both constituency priorities and his membership of no select committee.
His news coverage is consistently positive, focused on economic development, local services, and health advocacy, including championing North Lanarkshire's suicide prevention work in Parliament. That health engagement dovetails with his assisted dying stance, though no biographical detail in the available data explains the connection directly. Ninety-day news sentiment data is insufficient to assess recent local coverage trends.