Hi Rebecca!
Welcome to planDisney.
It's always a pleasure to assist my fellow guests from the UK, and I'm happy to answer this question for you.
You may use several payment options around Walt Disney World. Credit and Debit cards, along with Disney Gift Cards, and cash in US$ are accepted. Your Caxton card should be fine as it's a pre-paid Mastercard, and Mastercard is accepted across the whole Resort - at the theme parks and water parks, at the Disney Resort hotels and at Disney Springs.
If you love to shop, you'll love
Disney Springs. For the widest range of souvenirs I highly recommend World of Disney (the biggest Disney store in the world!). I also love Trend-D for some unique boutique items of clothing and jewellery, and the
Marketplace Co-Op for an assortment of retail venues for a great selection of Disney homewares and candles, and some lovely vintage-style Walt Disney World theme park t-shirts.
Around the theme parks, I recommend you visit the Emporium at Magic Kingdom Park and Creations Shop in EPCOT for the best selection.
If you are dining in the parks, your Caxton card should be accepted everywhere - from
Be Our Guest Restaurant at Magic Kingdom Park to a coffee at Creature Comforts (Starbucks) at Disney's Animal Kingdom Theme Park or the most delicious cupcakes at
Sprinkles, Disney Springs.
Please come back and visit us if you have any further questions, you can also
send me a direct question if you wish. We will be happy to help you plan your magical holiday to Walt Disney World!
Sue