John Chapman, Colin Hume, Ralph Meakin (who introduced us to modern squares one year at Whitby and brought some very helpful members of his club to get us through), Geoff Cubbitt.
We went to Ranch House Squares in Wythenshawe for a couple of years with Trevor Day. No sign of them on Google.
Whitby also had Culver Griffin one year (his tour company went bust while he was here - before the days when they all propped each other up)