Saw this in my local Sainsburys today and they had a fair few left.
Reduced from around £9 to £2.25 this seemed like a good deal for a known brand (masterplug) of electrical product suppliers.
Very useful when using high risk equipment such as garden and Diy tools.
A small price to pay for protecting you and your family from a serious electric shock.
Should be nationwide as well from what I was told at the till.