The Trots in the UK had largely monopolised visible, organised, "branded" lefty politics for several generations. Unlike other coutries where the CP, Maoists, Autonomists and Anarchists etc. swamped the Trots to the periphery/historcal footnote, for some reason here they were the first (and usually last) port of call for people wanting to get involved in a lefty group. Since WW2 the scene was dominated by the dynastic tendencies ( plus the upstsrt IMG) in their various incarnations. But they're all gone now
WRP - all gone.
IMG - all gone.
SWP - going, going , gone.
None og the little grouplets left have anything like the visibilty or influencr their parent orgs had. And memberships can be couted in their dozens.
The SWP ten years ago wrre "big". They ain't now. And a WRP style splintering will finish them as a meaningful force. They simply don't have the numbers to survive it.
Will the SP move on from the Trot brand? I'd guess so. But it's up to youse, no?