Next you need to remove the sides fabric and foam from the seat base the fabric is heald in with more of the metal clips from the top of the seat and a plastic rail on the bottom of the seat,

there is also some double sided tape on the back, if your fabric is ok be gentle when romoving it to keep it in good condition, once removed you should see if your seat is knackered something like this



I had a replacement part that looked a bit better


I fitted this in the reverse order to removal, making sure that i pushed down all the clips that I had to lever up and put the loops back in that I took out, this left me with a finished bottom half that looked and felt considerably better than 15minutes ago


next was the top half of the seat