Just spotted this on AO.
Hotpoint Ultima S-Line RPD10477DD 10Kg Washing Machine with 1400 rpm.
Was £399 - add the promo code WASH10 at check out, works out at £359.10.
An extra 2.75% off if you use Quidco, so essentially getting it at £349.22.
Reviews are pretty good for this machine but a few people have said it has long cycles. These can be adjusted though.
Also, comes with 10 year parts warranty with only 1 year warranty. So, if it breaks down after a year, it'll probably be quite expensive for the manufacturer to fit the 'free' parts.