Cor - theres some terrible swipage going on there! The Keith Page fight scene is a complete Ezquerra lift, and the funfair one has a suspicious panel by the great McCarthy that looks very familiar to the scatterbeam shot from the very first stront!
As for the swearing...
"Stonk them!" in the Keith Page one...struck me as a bit GP Rice.
"Mists of Neptune!" in the funfair one is very Jack Adrian (Chris Lowder)
Bill Henry is a pseudonym, yes? Presumably someone with two sons called Bill and Henry? According to a Sexton Blake website, Henry is Adrian (that is, he's Lowder!). That would make sense "Jack Adrian" - "Bill Henry"
On top of those, there are also:
Assault on Trigol 3 (2000AD Sci-Fi Special 1979) 8 pages
Script: Steve MacManus, Artist: Rob Moran, Letters: John Aldrich
Thrill Power: ? (4 votes)
Strontium Dog: Untitled (2000AD Annual 1982) 6 pages
Script: Gary Rice, Artist: Steve Kyte
Thrill Power: 5.83 (6 votes)