theres a lock nut on the back one that everybody forgets to tighten, it then rotates inwards over time thanks to heat and vibration.Thanks for that, it actually turned out fine, cleaned and sorted out the caliper
they were actually the magnetic type
halfords is just round the corner from her house so I just went in there and got the right pads for £9.99
she needed the bike so no point looking for cheaper
Used some brake and clutch cleaner and also on the disc
due to the caliper pad adjustment screw, the large one on the inside of the caliper is what ruined the old inner pad