Hi Chris,
I changed both front wheel cylinders with new and new flexible hoses which seems to have sorted the problem.
Unfortunately four operations I now do not know which cured. The car has not had much driving since due to winter months
I will post if further problems. I have been in touch with John Gillard who did quite a lot of work on my car in the past and he informed me this had been a problem before with this car.
Fingers Crossed
Thanks for reply much appreciated David