Before the Sinclair ZX80, there was the Nascom 1. It was an inexpensive, Z80-based computer kit sold primarily in the U.K. Unlike the ZX80, it came without an enclosure. Owners had to buy or build a case. A more capable Nascom 2 followed the original model.
Lucas bought Nascom, and in 1982 introduced the Nascom III, a more polished system with a keyboard and enclosure.
Nascom I (1978, early micro)
Base Configuration: Z80 CPU; 2K RAM; 1K ROM; TV video port; keyboard; RS-232, TTY, and parallel ports
Lucas Nascom III (1982, desktop)
Base Configuration: 4MHz Z80A CPU, NAS-DOS in ROM, 48K RAM, two 5.25-inch floppy disk drives, integral keyboard
Video: 25-line x 80-column text, 640 x 256 graphics, eight colors
Important Options: CP/M 2.2