@CXRAndy You missed the bit about it being a D-Fuse shaped seat post so rotational pressure isn't possible without breaking the frame or the seatpost
As it's a carbon post I don't want to use WD-40 etc as they cause the resin to swell ... making it even harder to remove.
I also don't want to have to pay out another £120 to replace the post either ... Looks as though I may be going to "The Seatpost Man"
Although I am going to have one more try with hot water, and an "Improvised" Slide Hammer. ... I also have a pipe freezer kit so may try a combination of both heating and cooling ... The Ali down tube should expand and contract much more than the carbon post, so that may be effective on it's own
Needed