In article , "Vortex"
says...
UK lampshade mounting hole is: 1 1/8"

Euro lampshade mounting hole is: 40mm

Anyone aware of a commercially available adapter?

You can make an adapter from a bit of copper wire - just twist the
legs until the ring is snug on the bulb holder, then crank them down.


|
_|_
/ \
| |
| |
/\_____/\
/ \


X
X
___X___
/ \
| |
| |
|_________|
/|-------\-|
___| | |_
| |
|_________|