To ask Her Majesty's Government how much time is required for a full review of parliamentary constituencies in the United Kingdom. [HL5850]

Under Section 3 of the Parliamentary Constituencies Act 1986, the separate, independent Boundary Commissions for England, Northern Ireland, Scotland and Wales are required to conduct a general review every eight to 12 years of the constituencies within their respective areas.

There is no specified duration for a boundary review. The duration of any parliamentary boundary review is entirely a matter for the relevant Boundary Commission. The last general review of parliamentary constituencies from announcement to completion in each part of the UK took six years and eight months in England, four years and four months in Northern Ireland, three years and five months in Scotland and two years and one month in Wales.