Was in Asda at 3am, the usual random after midnight stroll and noticed some Baby Event items on Clearance. The shelf label for these were £11, however scanning through the tills at £5. Grabbed two boxes in my local Asda (Portrack Lane Stockton on Tees).
The Blue ones were marked up as £7, however I prefer the Clear ones anyways
Cheapest on eBay looks to be £20 inclusive of postage, so looks like a right good deal :D