Square taper cranks, all the tools, screwed the extractor into the RHS,
"hmm, that's hard work, let's keep turning the allen key to the right"
"that's odd, looks like a thread appearing there"
FFS I forgot there is a bit on the front of the extractor that is for "wider" but is removerd for "normal"
Cue one buggered thread. LHS removed easily. Went back and gingerly removed RHS - I think a new crankset is in my future.
Now to have a go at the main job which was the UN54 BB. UN54 tool is huge, none of my adjustables or sockets fit, and my stilsons wont grip. FFS. And yes, I did check I was turning in the right direction - LH thread on RHS if my other external BBs are anything to go by