This is a design by Mike Abbott published in his book ‘living wood’ which I have made a few times now. I use split ash for the poles, treated with Osmo UV protection oil. I buy the tarpaulin from a company called Atwools. Because the back of the shelter goes right to the ground there is good wind protection, as long as this side faces into the wind. It was originally designed to be used with a pole lathe so there is plenty of headroom in it. I use additional ropes to tie all the edges down in order to make it a little more permanant, but this shelter definitely works best as a temporary structure. This particular shelter is at the Apricot centre https://www.apricotcentre.co.uk and there is another one in the pipeline, this time to be made with a group of young people as an educational project so watch this space.