DOB:17.12.1970 Crew position:Mid bowman Shore job:Electronics Profession/trade:Electronics design

Sheffield is an electronics specialist, a skill that will prove invaluable onboard GBR Challenge.

The 31-year-old has installed the electronics on boats that have raced in the Whitbread, the Vendee Globe and the New Volvo 60's.

He has also raced in the Whitbread Round the World Race and has worked on the foredeck in Admirals Cup campaigns.