Going to SISU HQ unannounced I am certain will be affective but has to be mid-week imo, going on a Saturday or Sunday would be like holding a pork pie tasting competition at a synagogue, no fucker will be there. More difficult to muster a crew mid week but there is a half term holiday in three weeks so might be a better time to get a few who work term time to go down say on a Tuesday/Wednesday, just a thought.