The council would have had notice of the complaint by April easily. They of course wouldn't have kept that secret from Wasps as it is potentially a material issue for them. Therefore, I think it's reasonable to believe that Wasps knew about the EC complaint.
Anybody watch the documentary about it (on the BBC, recommend you see it on iPlayer). Yet again market driven Toryism shown to harm the population, a national disgrace. Why anybody would vote for these scumbags is beyond me.