Indeed it does!
I managed to drill off the head of the screw without damaging the plastic lens....

Discovered some clever person had started the screw cross threaded. But with it all apart I was able to re-cut the thread from the back, un damaged side of the brass top hat using a good screw.
Now all I need is a new screw! well done for sorting this Peter

When I replaced my lenses (for clear) , I managed to source some Allen head , Stainless screws to replace the chromed steel (?) originals as I have found these can (and do ) rust quite quickly.
James