We have to play Wales and France.
Playing a made up set of teams will do nothing. It will not generate interest for the fans, players or the game in general.
To be fair any mid-season game will only be SL's players.
I think we have to bite the bullet and say that playing for Wales/France mid-season will not prevent players being picked for England in future competitions or when England play NZ/AS
I think we also have to be liberal with the Welsh and French sides for heritage rules. Make England selection very strict and a loser restrictions on Wales and France.
So no one can play for England unless they are born here.
Wales and France if you can find a connection then you can play. So Cuthbertson could not play for England, but I'm sure someone in the family tree spent a holiday in Wales once.
Obviously you tighten up the rules for France and Wales once they become more competitive. But for me if we want England to improve then we need more competition from our neighbors.
We will also have to accept for a few years there maybe some blow out scores, just as there were when GB played Australia in the past.