The sub lease agreement for CCFC to groundshare would have had to have been approved by the EFL and to have been in line with their regulations:-
“Except in cases where a Club seeks consent to enter into a ground-sharing agreement with another Club, it shall be a condition of any such consent that the ground-sharing agreement shall contain provision to ensure that:
the playing of any of the Club’s first team matches will always take precedence over the activities of the other party to the agreement;
the Club shall have the ability to postpone other activities scheduled to take place on the pitch in the immediately preceding 48 hour period where in the opinion of the Club, acting reasonably, there is a risk that such activity may result in the subsequent postponement or abandonment of a match to be played under the auspices of The League;
and where a sport other than football will be played on the pitch the playing surface shall be a hybrid (i.e. Desso or equivalent) construction, the specification of which shall be subject to the prior approval of the League.
For the avoidance of doubt, the requirements of this Regulation 13.4.3 will apply to all existing ground share agreements with effect from 1 July 2019.
Guidance Clubs must have primacy of fixture and show the ability to postpone any other activity on the pitch on 48 hours’ notice. “
So wasps, while pointing out that CWG had leased until 14 August, presumably would have been in breach of an approved tenancy if they had not allowed CCFC to play their home fixtures. We all assume that there will be a clause in the tenancy agreement required the playing surface to be of a standard defined by the league, so Wasps will be in breach of that clause.