Mat Irvine's involvement in Smallspace meant some of the original Blake's 7 props were on display.
I was particularity pleased to see the only surviving Liberator from Blake's 7. The model is more or less complete, and still bears the scars of the space virus that affected it in the final episode of season 3, Terminal.
There was quite a few other original Blake's 7 props that have survived over the years. These System Chase Ships from the episode , Redemption.
The Atlay Shuttle from the second season episode, Voice from the Past.
'Orac' the artificial super brain, first mentioned in the penultimate episode of season one , Deliverance, and first seen in the following episode, Orac.
Part of the Teleport controls.
Finally, the Andromedan Scout Ship which was made from sticking two Morphy Richards hairdryers together. It is seen very briefly in, Star One, the final episode of season two.