I booked our summer holiday to Cyprus with TUI in January, and paid an initial £200 deposit. A further £600 is due next week, with the remaining balance due in May. Tried to cancel the holiday due to financial uncertainty, but they said we would have to pay £800 to do so (the initial £200 + the £600) which isn't an option. Seems highly unlikely that travel will be back to normal by summer so I doubt the trip will go ahead, but don't want really want to have to shell out more money at the moment. Do I have a leg to stand on if I withheld the next payment?