3 bolts mate very easy job

remove wheel
look at bottom of the hub(were the brakes bolt on)
there is a metal arm with ball joint on the end to the brake hub

remove the bolt that goes through the bottom called pinch bolt(replace on refit)

them 2 bolts about 15mm i think undo both these bolts with 19mm spanner holding the nut on top of the bolts when all loose wiggle arm off

reversal for refitting

spray some wd40 on the nuts of the 2 big bolts b4 removal

garage will charge £100 for doing this ,arms only cost £20 from local parts shop

tommy