dave wrote:
Do LL lamps (as sold in many diy stores) contain Hg vapour? If so, how should
they be properly disposed of?
Same question of fluorescent lamps - or is there some other element/risk with
them?

Fluorescent lamps contain mercury - as such they are classed as
'Hazardous waste' under European regulations.

You are best off asking your local council for the options available in
your area. In most cases, these lamps should be accepted at the local
tip - although they will probably have to go in a special skip.