, a snorkeller was left 'screaming for help' after being bitten by a shark off Cornwall in the first attack of its kind in 175 years. The woman - who has not been identified - was in Penzance, Cornwall, with Blue Shark Snorkel Trips when the accident happened last Thursday.But just how common are sharks in British waters? Following the incident, MailOnline has delved into which species are living around...
