Experience in buying flight ticket direct from British Airways. If the flight is cancelled by BA, do not replace to voucher. Instead, Ask for a refund, to buy a new ticket. Voucher,especially future vouchers, are very difficult to use for booking new flights. If you are able to book a new flight, you will not be given an e-ticket until 24 hour before departure, but e-ticket will be offered at a price 3 times the online price! Be careful with traps like that. Finally, I asked for a refund and BA promised to return my money, but until now (more than 2 months) the refund has not been credited to my credit card!