Wiggle - deleting a payment method

I've just bought some pedals from Wiggle. When I got to the payment page I noticed that some of the credit card fields were populated with my Wife's debit card details (I use PayPal so I guess that She ordered my a gift in the past).

To be fair it's only the card name and long number (no expiry date or 3 digit security code) but I'd like to get rid of it - I rarely save card details on websites in case an account is hacked.

The field are ghosted and can't be deleted and I can' find any option in the profile to delete payment methods. I have contacted Wiggle but thought I'd ask here in case anyone has run into similar.