When did this happen?

2026-06-05

What zones are affected?

GB

What is the problem?

new, more up-to-date, data exists than is currently used
capacity should be 21.8GW (or 21.5GW if capacity at start of year is desired, as shown by configs), not 15.9GW
https://www.pv-magazine.com/2026/06/04/uk-hits-22-3-gw-solar-capacity-as-cost-per-kw-falls/ (includes NI i think so this is slightly too high)
https://www.gov.uk/government/statistics/solar-photovoltaics-deployment (doesnt include NI)

fixed in #8749