Thanks stjohnsmythe Watched led behind P symbol for over five minutes and it never went out. So I will be disconnecting the aerial and hopefully this will cure the problem.

P38 4.0 SE - purchased a new battery (120ah - 1000A) in October. Also fitted new spark plugs and leads in November. Over December and January if I do not run the car at least 20+ miles every day then it will not start ad I have to jump it. Is this just normal or could I have a problem...