Thanks BA
Having just nearly f***ed up my wedding anniversary by getting my departure time at Gatwick for Prague wrong by 3 hours, I would just like to offer a big THANK YOU to BA, who, despite me having non-refundable tickets, offered me same day secured tickets from Heathrow, and saved my bacon!!
Well done, and EZ jet - look and learn about customer service.
Cheers BA!!!
(Oh & another point, you can make it from Gatwick to Heathrow in under 2 hours, but 4 days in the short stay car park at T1 will leave you crying at the cost (have a clean credit card!)).