Regrettably, Google Groups is currently sick and not updating (possibly due to development work on a new version which tends to take longer there than here) -- it will catch up eventually. But you can see there a recent thread started 22nd July entitled "Contacting a Solicitor" which dealt in part with what happens when a solicitor ceases to practice, although there were inconclusive replies and it was drifting off-topic at the time Google stopped Googling.