Many thanks monkjunk. I forgot that some entries were measured upwards. I have completed the grid and identified the names and as one who struggles am delighted to finish (Go to the bottom of the class. Sir, I am at the bottom of the class. Well go to the top but remember you are a lap behind (Will Hay)). What an excellent puzzle.
I still cannot parse the 7 down Archie Moore clue. As far as the 7 misprints are they using a US spelling? The ones I have bizarrely form an anagram of an African singer and dancer and this led me up a real blind alley.
However many thanks to the setter and all those who helped - off to catch herrings