Why has it taken British Gas a year to sort out my electricity account?

[Tony]

Guardian Consumer Affairs

I can’t let out my premises until this happensI have been waiting for more than a year to take over an electricity account with British Gas on a small commercial premises.Thirteen months after the previous tenant left, I am still without an electricity supply – and cannot rent it out until I have...

Why has it taken British Gas a year to sort out my electricity account? (external link to Guardian Consumer Affairs)