Rip Kirby was reprinted in the UK in the Daily Express, I believe, and, subsequently, in a cut-up format in the Super Detective Library. I've been able to i.d. some of the stories but there are a few that remain elusive -- all the strips were
Below, 'Rip Kirby in Duel With Danger!'. Published in the UK in 1958 and featuring Rip's nemesis, The Mangler. I'm thinking this might be the story unofficially known as 'Treasure Hunt', also published as 'Buried Treasure' (06/12--09/23/50).
Next up, #130. 'Rip Kirby and the Race of Death' -- wherein Rip is racing cars and getting tangled up with Jet Allyson. Not sure what this one might have been but it dates from 1953 and could be the strip that ran 05/11--09/05/53.
'Rip Kirby's Dangerous Manhunt' appeared here in 1958 and might be 'Return of the Mangler' (05/26--09/27/52) but, as he returned more than once, it would be useful if someone could confirm it one way or the other. Pagan Lee is also involved.
Next: 'Rip Kirby and the Prisoner of Doom Castle'. This one first appeared in 1954 but could be one of a couple of stories.
There are three more stories that I've yet to identify... but I'll have to post those later as I need to sort out the scans. These should keep you all busy for now. And if you can't contribute to the Rip Kirby Story Hunt, at least you've had a chance to take a look through some examples of Alex Raymond at his best.
If anyone has any scans of Rip Kirby strips from the 1950s, I'll be happy to post them to show how the British versions were altered to fit the pocket library format.
(* Rip Kirby © King Features Syndicate)