A leading user-led arts organisation has raised new concerns over the search for volunteers to take part in the opening and closing ceremonies of the London 2012 Paralympics.

Last week, disabled artists and performers warned that many disabled people would be put off by a call from London 2012 for 5,000 volunteers with “huge amounts of energy”.

The 2012 organising committee LOCOG has defended the call and says volunteers will need “an expectation of what is required of them so they do not drop out when they realise it is going to be quite demanding