What Happened to the Society of Cartographers?

The Society of Cartographers posted a notice on Twitter announcing the formal dissolution of the Society after its upcoming (and now presumably final) Annual Summer School Conference. That conference will be held in conjunction with the British Cartographic Society’s Annual Conference on 11 and 12 September at the Ordnance Survey’s Southampton headquarters.

Apart from reactions like Kenneth Field’s, there is no other information about the Society’s dissolution available online, though I wouldn’t be surprised if there’s been discussion in members-only areas. What on earth happened? (Comments open.)

Previously: Whither the BCS?