I assume the MCBs are still ok and could be used on another CU if they fit, but the three RCDs are weird. They are (probably) single-pole, and appear to be piggy-backed onto a 16A, 20A, and 32A MCB (but not the 6A lighting MCB). Maybe Adam or John can remember these. Are these devices of any use at all? Is it in line with the Regs to replace a previously-compliant MCB or RCD with an identical device which is not compliant with the current Regs? Or are they only fit for recycling?