What's happened, and what next
What happened
MHCLG announced in March 2026 that it would implement "5 unitary option 1A" for Hampshire and the Isle of Wight, with vesting day on 1 April 2028. Portsmouth would have joined a new South East unitary with Fareham, Gosport, Havant, three parishes of East Hampshire and one of Winchester. Portsmouth City Council was one of seven councils that submitted the five-unitary proposal, and its cabinet subsequently voted in March 2026 to pursue judicial review of the process, with a claim deadline of 24 June 2026. The consultation ran 19 November 2025 to 11 January 2026 and drew 5,163 responses. On 7 September 2026 the Secretary of State withdrew the March decision, citing updated legal advice, and announced a review of the whole reorganisation programme. Councils were asked to stop implementation work, and the May 2027 local elections will take place on existing council boundaries.
Why it matters
Determines who sets council tax, runs social care, housing, waste and planning for Portsmouth, and whether the city retains a council of its own. Reorganisations also carry transition costs and typically freeze or slow other decisions while they proceed.
What's being done
Nothing is being implemented: the government withdrew the March 2026 decision on 7 September 2026 and asked councils to stop implementation work while it reviews the whole programme. Portsmouth City Council — one of the seven councils that submitted the proposal — had separately pursued judicial review of how the boundary decision was reached; what happens to that claim now is not confirmed here.
Has it worked?
Not applicable — the decision was withdrawn before it took effect.
What happens next
The outcome of the government's review of the reorganisation programme, which the minister linked to the forthcoming Devolution White Paper. No date has been published.
Cost
Transition costs are not published. The claimed saving is £63.9m a year across the whole area, per the proposing councils' own business case; no independent costing of transition or net saving has been identified.