HELP, how do i undo the caliper to change my brake pads on a 52 plate 1.2 8v punto, the obvious nut will not move and cant work out if its an allen key or a star key to undo it any ideas?

hi i just looked in the haynes manual and if yoyu doing just a pad change you in luck there isnt actually any bolts to undo lol

at the bottom of the caliper there is metal pin held in with a small clips so it dont come out, it sais to pull the clip out then ther eis a metal pin you pull from the back, once that is out the caliper should pivot up wards so you can pull the 2 pads out.