This is also known as the EZ Bed. It is on sale down from £249 which seems to be the general price for it elsewhere too. Looks like a good price to me....
Inflatable double guest bed. Looks and feels like a real bed. Can be plugged into any 3 pin plug socket and automatically inflates opening as it expands. Easy to set up and quickly deflates. The frame easily pushes back into the case and zips up ready to store. A powder coated steel frame supports 450lbs/200kgs.
Use the voucher to get the extra £10 off. :-)
Delivery appears to be unavoidable so total cost is £119
Not sure if the £20 voucher for £100 spend works though?