Bills for homes using a typical amount of gas and electricity will drop by £11 a month.

The Nationwide says the fall may reflect weaker demand following April's changes to stamp duty.

Campaigners say the UK's system has been "overlooked for years", and investing in it is a "no-brainer".

The announcement has come alongside the annual publication of royal finances.

The government met with Deliveroo, Uber Eats and Just Eat after a report said drivers were sub-letting accounts.