I smile in the face of part P!
Today I replaced my 30+ year-old Wylex fusebox with a nice new 12-way MK split load consumer unit & RCD/MCBs. Initially I wasn't sure there was going to be enough "slack" at the end of all the circuits but by careful positioning of the MCBs it turned out fine. Got to re-wire the DC side of the doorbell with 1mm T+E as it was only using bellwire before, with the transformer just shoved behind the busbar!
Not even cutting it fine, 9 hours to spare, though it was a bit dingy connecting up the new meter tails by torchlight ;-)
Anyone else been at it?