Jon Brookes was recently diagnosed with a brain tumour
The Verve's Pete Salisbury also makes his debut at London Oxfam store
Pope Joan and Ikonika also join this year's line-up
Band announce tempoary drummer for UK tour
Drummer to undergo treatment in UK after passing out at US gig
Brookes initially stopped breathing before being resuscitated by a doctor in the audience
The follow-up to 2003's 'I Believe' is set to have 'a European flavour with a New Zealand twist'
Members of The Horrors are also set to play in charity shops
Acts headline away from the Chelmsford event's Main Stage