Hi Guys
Doesn't help you too much,

but..
Have a look at the pics I took of the LHD car Peter Powell built (& therefore, Tim did all the work.

)
It's the Giacomo Ceccato (Italian Demonstrator Car), in members cars on the main clubsite, that was waiting to be collected when I was in Wales one day.
Has 1600 4AGE, & the small V8 type bonnet bulge, like my car.
So must have been some sort of a bonnet/engine contact (you can see the oil filler is right under the fitted bulge).
Matt.