So I went out last night for a few drinks and was told that there was going to be a heavy frost over night.
Obviously the major thing I was thinking about was "my apple blossom!!" so when I got home at about 12.30am I went straight into the garden and did this:
Yes. A black bin bag and some gaffa tape.
The lesson to learn here is; don't go into your garden after multiple beers.
Oh and of course there was no frost anyway :)