STUNNED Christine Hill got a big Christmas shock when a £1,100 bill landed on her doorstep from a company she is nt even a customer of.

The 34-year-old British Gas customer has received bills from Npower for the past four years - all demanding payment for gas for the flat beneath her.

But after the latest bill arrived at her home in Heaton, Newcastle, Christine had had enough.

She said: "It has become a real pain. I pay my bills to British Gas by direct debit, so when these letters came demanding money for the other flat, I was a bit surprised.

"I'm running round in circles trying to sort this mess out, but things are getting a bit threatening now.

"This has been going on for four years now, and I feel really trapped by it.

"When I contact British Gas, they tell me one thing, Transco tells me another and Npower something different."

Jennifer Corby, for Npower, said it was possible that a clerical error had been made when meter details were requested, and the two flats had been confused.

She said: "We are looking into this problem for Mrs Hill, and of course we are very keen to resolve any mistakes which may have been made.