On Fri, 23 May 2014 11:01:07 +0100
"Brian Gaff" wrote:

I've also had strange things happen in greenouses with plastic sheet
going bang, turning black and all scrumpled up and brittle. i assume
this is some kind of sun damage, which is not really welcome in a
greenhouse!

You haven't had any nuclear bomb testing recently in your area?

--
Davey.