Dozens of new members came to the meeting as well as Labour supporters who also voted to back Corbyn in a consultative ballot.
Corbyn is currently the bookies favourite to win the leadership race having first being ranked as an outsider. Polls are giving him a commanding lead and he has the support of a large number of constituency parties and trade unions, including Unite, Unison and the Communication Workers Union.
The veteran MP is standing on an anti-austerity platform and was the only candidate to vote against the government’s Welfare Reform and Work Bill while the others abstained.
Anyone who wants to vote in the election can do so by registering as a Labour Supporter for £3 before August 12.