2021 Welsh Labour–Plaid Cymru agreement

In December 2021, the Welsh Labour government and Plaid Cymru signed a three-year co-operation agreement, where the two parties agreed to work together in 46 policy areas. The agreement was not a coalition or confidence and supply agreement; Plaid Cymru remained in opposition but appointed advisers to offices of the Welsh Government.

Source: Wikipedia — 2021 Welsh Labour–Plaid Cymru agreement (CC BY-SA 4.0)