"Government and aviation sources told BBC News that the quarantine would mean people might be expected to provide an address when they arrive at the border."
I know we are still awaiting more details but this sounds like a pretty soft quarantine to me or perhaps it is merely theatre. Surely testing all people (including returning Brits) on arrival is the way to go like Austria are doing. Is it really that difficult to set up at LHR given that passenger numbers are way down? I read somewhere that BA's passenger numbers are 1% of what they normally are and much of that will be domestic travel within the UK.