My supply was replaced some years ago from the main fuse to the meter at no cost.
She was going having a new consumer box fitted, the electrician said the supply was inadequate - cue Scottish Power.
They say they have inspected the supply and came up with this figure.
As I have the only key for the site of the main fuse and have not admitted anyone how the inspection was carried out is questionable.
We are talking of a 1- bedroomed flat so the power used is not massive.