This is a pretty simple one, though it can save you buying a down pipe which would cost around £7-£8, and a filter!
All you will need are 5 plastic drink bottles, we're using the Buxton bottles because they curve in the middle and fit together really well when cut, but you should be okay with straighter bottles too.
You will also need to hang on to one of the plastic bottle lids; and a sharp pointed knife or a pair of scissors to cut the bottles.
The reason I added a filter is because one a bee managed to fly down the pipe and got lodged in there. Fortunately I was there to release it with no harm done, but it made me think of a way to prevent anything bigger than rainwater from passing through. Not only to save the wildlife from drowning in a barrel of certain death, but also to keep the water clearer and free from debris off the shed roof.
Step 1: What you need...
5 (or more if you need it longer!) plastic bottles
1 plastic bottle lid to fit
1 sharp pointed knife