Not sure if it has been posted here before but just stumbled across this site. It explains how to make a large cloche. The same pribciple could be used and rather than a polythene cover how about mesh or fleece?
http://www.powen.freeserve.co.uk/Projects/hamiltoncloche/Cloche.htm
HTH
Jerry
Thanks Jerry,
Just the sort of thing that I've been looking for!! :)
TimJ
;D ;D Snap ;D ;D