Have undone all 5 nuts and light is stuck fast.
is it just stuck with the sealant?
what is best way to remove?

Any suggestions appreciated

Thanks chris.

Use a hairdryer or paintstripper, beware that you don't melt them !!!!
When removing the units, watch out for the sticky black thing, it sticks on everything !!!

Creepy

Hair dryer. cheers will give it a go!!

you wasn't joking about the black sticky stuff what a nightmare.