If you come across a load of trees like this on your travels
They are more than likely held up with re-useable cable ties like this (bottom 1)
They are very useful loads of things and might just get you out of the poop 1 of the days, tarp fixings,bike repairs,attaching stuff to the bike etc etc. I always carry a couple.
Heres my GPS mount held on using a couple. It has never budged and is easy to remove.
Oh dear! I didn't realise that you could buy them a couple at a time, the forestry one's seem to only come in packs of 100 and I doubt I will ever need that many. I carry a few that were taken off the posts when the trees were big enough to be rabbit proof. I was merely pointing out that they are useful in an emergency and may be of use to someone someday. The Forestry Commission plant 24 million trees a year so I don't think they would miss a couple of cable ties taken from an appropriate tree. :)