Kinda interesting story about Blakes 7. It was bought in as a replacement for long running police procedural/soap opera, Z cars, a no budget early evening fixture on BBC 1. Problem was, it was allocated the same budget as Z cars. So you had a Space Opera with lots of SFX, spacecraft sets, and all that entails. It was in the preproduction stage when the producers saw Star Wars, and thought 'Oh ****, we're screwed!'
Nevertheless, it was very popular and ran for four series, and has one of the most legendary endings of any scifi show. The Blu Ray has new model shots overseen by Doctor Who model builder Mike Tucker and original SFX and model builder Matt Irvine. Haven't picked up a copy yet, the original DVD releases were pretty rough, i hope they've done a good job on this new set!