Waiting for Vesting Day: What the Pause in Lancashire's Reorganisation Costs, Through Which Channels, and to Whom

Working paper, data and code. On 7 September 2026 the Government paused the July 2026 decision to replace Lancashire's fifteen councils with four unitary authorities from 1 April 2028 and told councils to cease implementation work; by 3 October no new date had been given and the county council's Cabinet had authorised a protective judicial review claim. The paper asks what the pause and a possible slip of vesting day cost, through which channels, and to whom. It fixes three scenarios against the July timetable (a one-year slip, a two-year slip, and no reorganisation this Parliament), eight channels, and a rule that every figure is either read from a published document or computed from one with the parameter shown. It reads all fifteen councils' adopted budgets and later updates, the county council's July 2026 contract register and procurement pipeline, Blackpool's register, and 940 live awarded notices. Six councils planned explicitly to vesting day and now face a year, 2028/29, they had expected a successor to budget for, including the county council's £17.3M gap in that year and West Lancashire's £3.8M gap against £2.0M of usable reserves. A one-year slip moves 74 county contracts with £113.0M of annual value, 45 of them with £62.6M having no extension that reaches the new date, and 86 Blackpool contracts, from the successors' first year into the existing councils' last; no published English study prices a short-term premium, so the channel is reported as exposure, not cost. The cost of deferred savings depends on whose savings are believed: £82.1M a year forgone on the proposers' business case, £2.6M saved on the author's component model, £43.9M to £56.2M saved at the rates the 2019 to 2023 precedents reported. Preparation money paid or committed, the £30M implementation reserve and May 2027 elections in thirteen councils are set out council by council. The deposit contains the paper (Markdown), the rules fixed before any result, the data files with hashes, reproduce.py, which regenerates every table under Python 3.12 with openpyxl, tools/check_paper.py, which checks every table and prose figure in the paper against that output, and copies of every document quoted verbatim. Run "uv run python reproduce.py", then "uv run python tools/check_paper.py". The author is an elected member of Lancashire County Council and its Cabinet Member for Adult Social Care, and a member of the Cabinet that took the 1 October 2026 decision described in the paper; see the Declaration of Interests. The research and checks were carried out by AI agents (Anthropic's Claude) working for the author; no human peer review has taken place. Companion to Pickup (2026a), The Financial Case for Local Government Reorganisation in Lancashire, v3.1, DOI 10.5281/zenodo.23016761, from which five data files are copied unchanged. A companion article for general readers, with charts built from the package tables, is at https://tompickup.co.uk/news/lgr-delay-year-did-not-exist/ (published 3 October 2026, updated 4 October 2026).