Saw this in my local Tescos last night (Watford Branch) at £16.00. Could be Nationwide, don't know. Considering its only 2 weeks old, its not a bad price at all.
Cheapest price after is £23.95 from Shopto.net
Did not have my phone to take a pic last night but rang earlier to confirm that price is still at 16.00 and it is. Will go up and take a picture tonight if I can as well.