There was nothing wrong with engine bay, in fact it had a good deal of originality, unfortunately most of dirt so I thought it should get the "treatment"!
Autoglym Engine and Machine degreaser sprayed liberally throughout a warm but not hot engine bay. Dirt and grime was agitated with brushes of varying sizes before the engine was rinsed with a domestic hose avoiding prolonged contact with electrical areas and dizzy. Engine run again to allow to dry. Once engine was dry, it was sprayed liberally with Autoglym Plastic and rubber protectant, bonnet closed and allow to dry on warm engine. Bonnet opened again and handywork admired! (The under bonnet insulation was attacked with a combination of AG Engine degreaser and fairy liquid mixed up in a spray bottle)
Before:
After
