Found this on their facebook - they're already almost always the cheapest, so 5% more off is a great bargain.
Note that on their facebook they've also hinted in comments that they might apply the 5% off even if you've already ordered (t&c's say you can't) - worth asking, see their facebook.
SAVE an extra 5% in JULY at Appliances Online!
Just enter the coupon code 'SAVEFIVEINJULY' (All caps) at the checkout to receive your additional discount!
Terms and conditions:
Coupon is valid for new orders placed between 9am 24/7/2012 and 11:59pm 31/7/2012 only.
Coupon can be used on the purchase of any product, warranty and service offered on the Appliances Online website except agency brands such as Asko, St George, GE, Hoover
3.. Coupon can be used to purchase gift vouchers.
Coupon cannot be used in conjunction with any other coupon offers
Saving is off the total order value