First of all I know it's a price ending (and indeed starting) with a .97 but there seems to be stock available (2 of the 3 stores near me have stock). It's available for reserve & collect only now as all the home delivery ones have sold out.
Protect yourself against electric shocks with this residual current device or RCD:
* Protects from electric shocks
* Cuts power quicker than a heartbeat
* Tested & certified to IEC61540
For under a quid, there's no reason not to get one.
Because they use sessions on the site, click on the link and search for Classix.