I grew up in Ardrossan, which was of course solid A1 territory (see profile pic!) and the northern extent of the AA network. The AA coop owners did of course split from A1 in the early days of founding, Ayr - Ardrossan being the meaning behind AA. The Clyde Coast members also split, offering the Saltcoats to Largs service.
Dodds are the only remaining ancestor of the Ayrshire coops left (they dont run any registered bus services). Steele's of Stevenston, a former A1 member, wrapped up a couple of years ago and Clyde Coast wound up though former employees and a few cherished registrations are with Coast to Coast Travel based in Ardrossan.
Dodds have two former AA deckers, Guy Arab GSD799 and AEC Regal OKM317. Neither have saw sunlight for some time.
There are three preserved A1 buses at the SVBM, Daimler Fleetline NCS16P, Daimler CVG6 RAG578 and Daimler CVD DCS616 (back in A1 livery though had been converted to open top with Midland Scottish a long time ago). Ailsa PSJ825R is also at the GVVT though frustratingly hasn't worn A1 fleet names for decades! JXN366, a former London RTL, is also under restoration in England (it is a runner) and is unique in that it is the only RTL ever to be converted to front entrance, front staircase.
Sadly several former A1 vehicles, including former Leyland PD2 demonstrator NTF9, are lying rotting in a yard in Kilwinning owned by a relative of former A1 owner T&E Docherty.
It was my daily trips on board the variety of A1 vehicles that got me interested in buses and there's so many memories to share!