Join a massive line-up of the biggest names on the Fringe for a stupendous evening of comedy to help fight against brain tumours. Brain tumours are the biggest cancer killer for children and adults under 40 and increased funding for research is desperately needed. All box office income will go straight to The Brain Tumour Charity, and Underbelly will match this amount as a donation to the charity, doubling the amount that we can raise on the night. Last year's line-up included Frank Skinner, Chloe Petts, Ivo Graham, Emmanuel Sonubi and Adam Kay. Check UnderbellyEdinburgh.co.uk.