This is a bit arcane, but I cannae be the first Brit who's rebuilding a house from scratch, and someone might have been there before....

The house is (mainly) 120 yo, the electrical supply dates from the mid-60s, complete with cloth-covered wiring - which is why, despite being on 30amp tariff, we cant put the tumbledryer on at the same time as the microwave.

Needless to say, a complete re-wire is in my future, and ive already dug the trench which will carry the new threephase mains into the house - EDF have quoted me for digging the road up and installing a remote meter-reader.

Do EDF allow a 'new' supply to run at the same time as the old? I had a long discussion with the very helpful bloke from EDF, but I clean forgot to ask him this.

For obvious reasons, it would be useful to commission a newly-installed room as each one is done, without giving up the 'old' lighting in teh rooms not yet tackled.

TIA