Sir – The correspondence regarding Thornhill park-and-ride (Letters, November 24) implies that Thornhill is provided for use by London commuters. When Thornhill and Redbridge were originally built there was no parking charge and were designed to encourage commuters who either worked, or shopped, in Oxford to park on the city outskirts in order to relieve traffic congestion.

However, in recent years the number of buses travelling into London has dramatically increased and those wanting to take advantage of the service automatically park at Thornhill, which means it is usually full by 7.30am and those wanting to travel into Oxford have no hope of getting a parking place after that time.

London commuters should be charged for parking at Thornhill as they are not contributing to the economy of Oxford, but taking the spaces provided for those who work in the city.

Clare Richardson, Headington