Hi Lakers, I have just recently got changed from builders tariff to domestic tariff it wasn't at all straight forward.
Firstly the builders had me on single phase so I had to get an electrician to change it to three phase.
Then the electricity company, which is now under new management and called Aydem, wanted all sorts of paperwork:- deeds, planning permission,habitation certificate,passport translation,tax no, etc. (originals of course not copies)
I, along with the electrician spent the best part of a day going from pillar to post in their offices. The staff tried to be as helpful as they could but it was very frustrating trying to get the paperwork sorted out.
Then I had to get the electrician back to install a new meter after which I had to wait for 4 days over the weekend for Aydem to come and check it out.
The charge by Aydem was only about 65 Ytl but after I had paid the electrician a couple of days wages for running back and forth and bought a new meter it was a lot more than £35.00
It might be worthwhile giving the new company a couple of months to get their new system in place before getting yourself changed over.
In the meantime make sue your supply is turned off inside the house when you leave.