The Atom is Acorn's attempt to beat Sinclair's ZX80.
Year of feature (shown above)
That's Jason Fitzpatrick in the bottom left of those pictures. He's the director of the computer museum in Cambridge and supplied all of the computers for the film. He even landed himself a part in it!
Still have one of those in my attic
I had one back in these days:remembering these days, sparing my pocket money to increase the memory kbit by kbit to get full resolution graphics