Money raised from all ticket sales at the event on August 3 will be donated to the Addenbrookes Hospital Charitable Trust. This years festival at Haggis Farm Polo Club in Barton, near Newmarket, from August 4-7, will now include the extra date which will see some top artists performing for hospital charity. The evening will be headlined by Don Airey & Friends and will see support from Fresh Cream - a band led by Jack Bruces son Malcolm and includes Will Johns, nephew of Eric Clapton. The bill will be completed by Suffolk based folk band The Broadside Boys. The five-day festivities continue through to Sunday night with a total of 100 bands on three undercover stages, including Focus, Jim Cregan & Co (Rod Stewarts guitarist and co-songwriter), Carl Palmers ELP Legacy, Mostly Autumn, Hazel OConnor, Curved Air, Purson, Pink Fairies, Atomic Rooster, Son Of Man + Deke Leonard, The Pure Floyd Show and more on the main stage, plus a dedicated blues stage and an acoustic\/alternative stage. Tickets for the charity event, which can be purchased independently of the main festival are £20, but anyone with a CRF day or four-day ticket will be entitled to a discount. INFO: See the www.cambridgerockfestival website for details. Camping is available adjacent to the CRF site.