Hi Jane, I'm in Lancashire not to far away I hope, thanks for all the advice but I want to keep with a dynamo as the car has been built to concourse,
and so would also like to keep it to a sealed beam unit. Have found a classic motor bike place that has a 5 3/4 sealed beam with the three prongs which
where used on old triumphs, bsa ect is there any reason why I couldn't use this.