hi bazza.
the old seal just pulls off.
unscrew the metal rods from the fridge door and screw the new ones on.
put a strip of tape around the new seal and also on the new metal rods and stick together.
this better done with the door off and and on the floor.
be careful when offering the seal to the door, you only get one go! make sure it’s properly lined up.
maybe better to have help to line it up.