hello guys, I'm her previously mentioned boyfriend.
I managed to fix the problem and wanted to update you all on the issue.
so as mentioned the seat was Jammed in the full back (to accommodate me :p whoops) and would not budge forward, the mechanism worked fine, when the leaver was pulled everything realised, but the back left corner of the seat/ runner was jammed solid. so after a couple of hours of prodding poking and fettling nothing was working. so I resulted to the Clarkson method and used a hammer on the rail and to my joy the seat budged a smudge. so now having the seat forward I undone the rear bolts and then the fronts and took the seat out.
once out it all become clear, in between the runners there are plastic ball bearings and one of these has snapped in half jamming the system solid, running it up and down I got both halfs out and instantly the runner became smooth and operated correctly.
so bewared it could now also be the plastic BB's splitting stopping operation. and a word of advice (obviously) I disconnected the battery as the seat had a airbag but reconnecting this knocked out the remote locking, there's a guide on here that was super easy to do so don't panic like I did.
thanks for all your advise guys
and wish the car luck for her MOT next week
Dave