That's very kind of you, thanks, but I've resigned myself to not going. I wouldn't book a flight until at least after 9am tomorrow anyway, depending if I got a ticket, and from what I've seen throughout today, anything found tonight will likely not be available tomorrow morning.
Again, thanks...
Can’t find anything from any London airport under £550 for a Weds flight. Starting to have second thoughts now. Can’t really justify that, let alone afford it.