Amazon UK have Deep space Nine, Generation, and Next Generation coming up as their lightning deals. Just go to film and TV and scroll nearly all the way down. These are getting repeated - I think they reduced DS or NG to fifty pounds but I can't find the previous deal (camel does not show it) - just remember they don't reduce the VAT.
Not really for me but if anyone can confirm the price drop (they seem to repeat the drop for lightning deals they repeat) you would be able to see if it is worth your while staying up for the deal.
For the other deals
Downton Abbey Blu ray 1 and 2 should be £20.97
Frasier 1-11 should be £44.47
Mummy trilogy should be £10.97