Here are another couple, No.31 from 1972, with the addition of the Mark Strong 4 page supplement to introduce a regular strip starting next issue, Mark Strong was an action figure by Mattel at the time and I suppose the strip was an advertising tool. Thanks to Dan for the supplement, and for help with 1980 - No.35...
29th July 1972 - No.31 (Full Issue)
Strips: Crowther in Trouble (Tom Kerr), On the Buses (Harry North), Doctor in Charge (Tom Kerr), Please Sir! (Graham Allen), Catweazle (Gerry Embleton), Follyfoot (Mike Noble), The Fenn Street Gang (Unknown) and Timeslip (Unknown) - Additional, Mark Strong Supplement (Unknown).
23rd August 1980 - No.35 (Full Issue)
Cover: Madness by Arnaldo Putzu.
Strips: The Benny Hill Page (Bill Titcombe), Charlie's Angels (Jim Baikie), Worzel Gummidge (Mike Noble), Meet the Smurfs! (Peyo), Battlestar Galactica (Martin Asbury), Sapphire & Steel (Arthur Ranson) and Mork & Mindy (Bill Titcombe).