Here are some more tweets with scans of TV listings that feature Knightmare. Some of these are brilliant as sources of publicity photos we were previously unaware of.
For convenience, I've included the ones I posted about earlier.
TV Times, 12th October 1987: Series 1 Episode 6
TV Times, 5th September 1988: Series 2 Episode 1; photo of Gretel and Folly
Radio Times, 17th October 1988: Series 2 Episode 7; includes article about catacombite
Radio Times, 12th December 1988: Series 2 Episode 15
Radio Times, 19th December 1988: Series 2 Episode 16
TV Times, 8th September 1989: Series 3 Episode 1; photos of Velda and Treguard
TV Times, 15th September 1989: Series 3 Episode 2; photo of Merlin
TV Times, 22nd September 1989: Series 3 Episode 3
TV Times, 29th September 1989: Series 3 Episode 4; photo of Folly being menaced by the Troll (obviously a Series 2 photo)
TV Times, 6th October 1989: Series 3 Episode 5
TV Times, 13th October 1989: Series 3 Episode 6
TV Times, 20th October 1989: Series 3 Episode 7; photo of Mellisandre
TV Times, 27th October 1989: Series 3 Episode 8
TV Times, 3rd November 1989: Series 3 Episode 9
TV Times, 10th November 1989: Series 3 Episode 10
TV Times, 17th November 1989: Series 3 Episode 11; I like the description of Treguard
TV Times, 24th November 1989: Series 3 Episode 12; photo of Hordriss
TV Times, 15th December 1989: Series 3 Episode 15
TV Times, 7th September 1990: Series 4 Episode 1; photo of Treguard and Pickle
TV Times, 14th September 1990: Series 4 Episode 2; spot the typo
TV Times, 21st September 1990: Series 4 Episode 3
TV Times, 28th September 1990: Series 4 Episode 4; photo of Fatilla
TV Times, 5th October 1990: Series 4 Episode 5; long description that refers to Dunswater and the Tower of Time
TV Times, 12th October 1990: Series 4 Episode 6; photo of Motley
TV Times, 19th October 1990: Series 4 Episode 7; photo of Gundrada and Mellisandre; unusually, episode description gives the dungeoneer's full name
TV Times, 26th October 1990: Series 4 Episode 8; refers to 'the annual Knightmare competition'
TV Times, 2nd November 1990: Series 4 Episode 9
TV Times, 9th November 1990: Series 4 Episode 10
TV Times, 16th November 1990: Series 4 Episode 11; note the photo/caption mismatch in the Channel 4 section
TV Times, 23rd November 1990: Series 4 Episode 12
TV Times, 30th November 1990: Series 4 Episode 13
TV Times, 7th December 1990: Series 4 Episode 14
TV Times, 14th December 1990: Series 4 Episode 15
TV Times, 21st December 1990: Series 4 Episode 16
Radio Times, 6th September 1991: Series 5 Episode 1; photo of Pickle
Radio Times, 13th September 1991: Series 5 Episode 2; photo of Hordriss
Radio Times, 20th September 1991; Series 5 Episode 3; no details of episode
Radio Times, 27th September 1991; Series 5 Episode 4; no details of episode
Radio Times, 4th October 1991; Series 5 Episode 5; photo of Lord Fear
Radio Times, 11th October 1991; Series 5 Episode 6
Radio Times, 18th October 1991; Series 5 Episode 7; no details of episode
Radio Times, 25th October 1991; Series 5 Episode 8; photo of Gwendoline with Smirkenorff
Radio Times, 1st November 1991; Series 5 Episode 9; no details of episode
Radio Times, 8th November 1991; Series 5 Episode 10; photo of Skarkill
Radio Times, 29th November 1991; Series 5 Episode 13; photo of Pickle and Elita
Radio Times, 20th December 1991; Series 5 Episode 16
Radio Times, 13th November 1992; Series 6 Episode 10; includes dungeoneer's full name
Radio Times, 9th September 1994: Series 8 Episode 1; photo of Treguard and Majida with description referring to the Brollachan for some reason