Very have got these Virgin Experience Days Marriott spa day for 2 vouchers at £21, normally £24 on Virgin's site. At £10.50 per person that ain't bad for a relaxing day out.
Bonus is if you are a new customer use code KNYMH and open a credit account to get £20 off £40, then put 2 x these passes into your shopping basket and get them all for just £22. That's £5.50 per person or two visits for 2 people at £5.50 a time - you do the math!!!! Well I just have ;-)