Thanks crafty, I had a better look at this last night and while the replacement of the circuit is straightforward enough, I think connecting the MCB/RCD into the meter tails is one step too far for me....off to look at the Yellow Pages..
I am looking to replace our old and knackered Mira Sport Shower with the new version 'Mira Sport max 10.8kW'. This bit should be straightforward enough.
Currently though, the shower is wired from an 'old' 70's style CU, through a ceiling switch. I would like to see a bit better protection and...