So I finally got round to taking my car in for wheel balance today to try and get rid of the rattle but didn’t get them all done (only 3) as was told the LH RR Caliper was seized (they managed to free it but chances are it will seize again) They also said this is probably the cause of the rattle. Basically said it needed a new Caliper, disc & pads. I’m assuming I need to replace both sides (I know I would for discs & pads but wasn’t sure about the Caliper? Also in addition to the replacement Calipers (photo 1), do I need to purchase brake support plates(photo 2)? Any help would be greatly appreciated. I’m hoping someone has already replaced theirs!