Jeremy Corbyn campaign rally speech soundbite

The transcript discusses a significant increase in Labour Party membership, with 2500 people joining within a few hours and thousands more joining over the following days. The momentum is expected to continue, with a special event called 'flying start Saturday' planned for the next day.

What can be inferred about the timing of the Labour Party's membership drive?

What does the text imply about the trend of joining the Labour Party?