To get this price you must be logged into Quidco but the discount applies immediately. You don't even have to enter the code it gives. If the 9% cashback kicks in as well, works out at £66.59! That's coming on for half the RRP. Still a great price without cashback though. Deal expires today so be quick.
Viking's site is a bit weird so you may have to go to http://www.viking-direct.co.uk/
and select 'Switch to our Personal Site' at the top before ordering to get the correct price with VAT added before going through Quidco.