I agree, I look forward to it starting up again. Glad to see local bookfairs and gatherings have taken off elsewhere too, I hope these continue rather than effort concentrates just on the London one. Not entirely anarchist groups and speakers have long been given space in the past - IWW and other Syndicalist groups (e.g. Education Workers Network), AFA, Jewish Socialist Group. I guess the difference between these groups and SPGB, ICC etc, is a matter of the degree of overlap with them and social anarchists, the willingness to work together, rather than be 'won over'.
I notice that SolFed, AFN and IWW are amongst those that haven't signed up yet - is there an organisational reason for this, or have they not yet go round to responding....?