I'm doing occasional long weekends in London from Switzerland. I'm currently flying Easyjet as they have evening flights back from London, rather than demanding I get to LHR for an 8:30am flight.
Also, the Easyjet booking system very clearly shows which days they have flights. The BA system shows the month pop-up with every day available, only to then tell me they're not flying that day. Plus the usual BA rubbish where you change the return date and the website pauses for ages, then says it has to re-price the outbound flight and takes me back to the outbound where, no surprise, the price hasn't actually changed.