Hello and thanks for the reply ,got the screw out and twisted it slighlty ,unclipped connector on top and with a lot of effort managed to get it to come out about 10mm and its solid and wont move now.Soaked with silicone for 3 days still wont budge
Access is difficult and can only think of pusing back in and out again-or heating up the housing or drilling it out or taking out the gear box

Any ideas appreciated