I Arrived in England from Germany yesterday, and bought some Tesco blades. used them this morning. Just returned to DE shaving after 30 years and using a Merkur HD. Didn't like the Merkur blades - seemed to drag and snag. Wilkinsons just seemed blunt. Cerus (German Drugstore own brand) blades were the cheapest and seemed to suit me best of those I could find in Germany, but these Tesco blades are in a different league - they just seemed to glide through the beard.
Later in the week I will look for the Boots' blades (which are supposed to be the same as Tesco), and I will find some Gillette's in Boots too, I guess. Lets see how that goes. Derbies I can buy cheaply on eBay UK, but I haven't seen the Personas advertised.
Glad I found the Tesco blades - quite a difference!