Mine is slightly different Ian. Well, they are kit cars. On the underside of the chrome bezel is a slot that you press a flat bladed screwdriver into. That releases a flat metal spring that allows the bezel to come away (watch the paint on the bowl). The headlamp internal housing is held in place by simple retaining screws. That provides access to the large nut and bolt that both fixes the headlamp housing to the badge bar and wings.

Kind regards, John.

Thankyou both.

On closer inspection, someone has drilled a small hole through the wing to take a screw driver, so I concur that there must be a screw or slot or some such. I will take a look at the weekend, thanks!

Ian