New figures show that in the 12 months to the end of August, 39.1 million passengers used the network - an 8.1% increase on the same period last year.

Metro operator Nexus has put the figures down to the success of discounted monthly and annual deals.

Nexus said the figures backed a call for more government cash to help fund a 20-year improvement plan.

Metro director Mick Carbro said: "People are using Metro more and more for summer days out and leisure travel, which has boosted passenger numbers alongside the steady growth in commuters."

Nexus director general Bernard Garner added: "A lot of hard work has gone in to making Metro a better service and this is reflected in the steady growth in passenger numbers.

"The growth in passenger numbers is the best possible argument for new investment, as we and the Tyne and Wear Passenger Transport Authority make our case for Metro re-invigoration over the next 20 years."