Getting a full refund is not great it's merely the very least you would expect.
I spent an unrecoverable £200 on hotel and train tickets which will not be compensated by TUI, all I got offered was £100 each voucher for future bookings
Worst thing being we only knew not to travel to Gatwick due to the Facebook group we are in. It took TUI until 1 pm to ring me, 2.5 hours after we were due to travel.