Many thanks, Colin. I appreciate your reply and suggestion.
I've solved my problem. It is only in very light winds, going to windward, that I have the lee helm and it is only slight. It has been abolished by sitting well forward to make sure the forefoot is biting and by sheeting the jib in a conventional manner. I think the lack of twist in the jib when it is set up on the club boom is not so good in light airs.
Yours,
John