It's already taking the (ahem) 'mickey' to have a London home, but choose to designate your Exmoor farm as your main residence, when your work is in London - but (strictly speaking) that is legal as long as you stick to your decision.
It's taking the (ahem) 'mickey' a bit further by then 'needing to stay in London because it's a bit late to travel home (whew - 7pm) after your show'- but (strictly speaking) that is legal as long as you get home asap the next day without any social contact.
It's taking a huge steaming stream of 'mickey' to then hang around the next day for a spot of tennis and socialising with your chums - and that is very much not legal.
Once again it's one nice 'instinctive' rule for me and much harsher rules for the plebs.
[ and, yes, I also unreservedly condemn the assorted Labour idiots who are rendering the rules unenforceable by their own actions - SKS should sack the lot of them ]