Hi Stephanie!
Welcome to planDisney.
It's always a pleasure to assist my fellow guests from the UK. I'm sorry your friends had to miss a holiday in 2020 - I know how they feel because it was a strange time when the borders closed and we couldn't travel to Walt Disney World. I'm happy to hear that they have another holiday booked, with you!
Without knowing exactly what sort of Disney credit they have, it's difficult to give you an exact answer. However, if it is a
Disney Gift Card, this can be used across the whole Resort - at all four theme parks,
water parks,
Disney Springs and the Disney Resort hotels. You can spend it on dining and in the stores, and there is usually no expiry date for a regular Disney Gift Card. You can basically use it like cash at all Disney locations. I highly recommend a visit to the
World of Disney store at Disney Springs - you'll have no trouble finding gorgeous "souvenirs" to buy with the Disney Gift Card.
To be sure, your friends will need to contact the tour operator with whom they made their 2020 holiday reservation to clarify how they can use their credit. If this was the Walt Disney Travel Company, please call freephone UK number 0800 028 0778 - you will need the booking reference of that reservation when you call. If the reservation was with a 3rd party tour operator, you will need to contact them directly for assistance with this.
Please come back and visit us if you have any further questions, and you can
send me a direct question if you wish. We are always happy to help you plan your magical holiday to Walt Disney World!
Sue