We used to have a calendar by the phone and, if the date was free, then bingo on a first come basis. Obviously if the suggestion was for both of us we would discuss it and respond accordingly. No such thing as permission or consultation. Total adult freedom.
If HMRC Knocks On Your Door — Say THESE 5 sentences
How to Start a Creative Arts & Crafts Hobby Without Spending a Fortune

. On second thoughts, I don't want to have to wade through loads of stuff about football!