Quick note on the tab mentioned above, the tab did not feature in the early cars and certainly not on our 1956 Plus 4. It is interesting to see that without the tab there is movement and vibration of the 1956 screen at this point so thus Morgan fitted the tab.

Morgans 1934 MX, 1947 Series 1, 1956 +4 TR4, 2000 +4 T16
Triumph Herald 1969 13/60
Morris 1970