While you wait for answers, we may have found some information which could help you.
Click here for Hot Water Heating Pilotcan I fix my internal flue hood on Thorn Olympic 15/60?
How do I light it?
unable to light pilot on thorn m44/54b boiler?
thorn m44 boiler fault?
thorn back boiler housewarmer s?
thorn apollo boiler no gas coming through ?