CityJet have already been caught with their trousers down with the former CDG base and how ex CDG crew were allegedly paid Irish tax, yet based in France. This is apparently why the CDG base was closed down.
It Irish tax is paid for LCY crew then it can only be a matter of time until the UK Inland Revenue are on to them. You would think they would learn from the past???
Cityjet is still expanding and Air France wants BA CityFlyer out and vice versa so Air France and BA will keep throwing cash at their LCY subsidiaries until there is a winner! All depends on which airline has deeper pockets!
or you could "relax", bury your head in the sand....and hope everything is OK.
Asking for trouble if you adopt that approach!
Cheers