Broadcaster Jonathan Dimbleby, is expected to be among the high profile figures gathered, having previously described the law as increasingly unbearable .
MPs to debate assisted dying after Dame Esther Rantzen campaign itv.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from itv.com Daily Mail and Mail on Sunday newspapers.
A petition for a debate on assisted dying, backed by Dame Esther, gained more than 200,000 signatures, triggering Monday s session at Westminster Hall.