Energy firm OVO Energy is introducing a new monthly fee to customers in a move which MPs worry will affect older people.

The energy supplier which has more than four million customers in the UK is set to start charging a monthly £1.50 fee to customers who still want to receive paper bills.

The charge will begin in December, meaning it will cost £18 a year to keep paper billing.

OVO has said it will write to its customers who still receive paper statements to tell them about the change and the…