Three of the seven on the list were unsuccessful and quickly disappeared (Dragon 32 almost immediately; Electron and Archimedes less so). No argument on the commercial and historical importance of ZX81, Spectrum, BBC Micro, and Amstrad CPC646, but to have to fill out a list of "key British PCs of the 1980s" with three dogs is kind of sad. Might as well get to 12 with Oric, Camputer Lynx, Grundy NewBrain, Z88, and SAM Coupé, amirite?

(Yes, yes, I know about Archimedes having an ARM CPU and such.)

And sys_64738 is correct; Spectrum is garbage and ZX81 is even more garbage. One can, as I do, acknowledge the astounding breakthroughs of something like 1K ZX Chess and The Lords of Midnight and 3D Monster Maze while still stating that they are amazing despite (or because) the hardware they run on is so terrible, especially when considering that Commodore 64 was only slightly more expensive.