Asda currently have a £3 rollback on all Huggies Little Swimmers Swim nappies.
If you go to the website below and sign up to the huggies club you get a "25% off - up to £1.50" voucher.
If you take this through the Asda self serve tills it automatically takes £1.50 off the swimmers (instead of the £0.75 it should take off).
Making them half price at £1.50. An assistant will come over to take the coupon from you.
I took 4 vouchers into my local store today and used them all - not a problem. :)
Huggies link: http://www.huggiesclub.co.uk/littleswimmers/give_little_swimmers_a_try.aspx