Helvellyn was discovered in 1985 and was acquired by Alpha in 2001 from BP.
The field has been developed by as a single subsea well tied back to the Perenco operated Amethyst A2D platform from where gas is exported to Dimlington.
Gas Production began in February 2004, and 18bcf of gas had been produced up to end 2015. There are estimated remaining reserves of 2bcf.
All developments on the Helvellyn have been completed. After producing the available reserves, Helvellyn will be decommissioned.