How to attach run to shed?

What's the best way to attach a run to the shed? Hoping to get mine sorted over the easter hols although need to get more paving slabs down first!

Well what I did was Daaaaaaad - and magically it was done :lol:

In reality I think he screwed through the wood at both ends and also through the flap part somehow but not sure how sorry couldnt be more help

It depends if you want it permanently attached or not. If yes then just drive screws through the run wood and into the shed. You can also buy metal brackets from places like wilkinsons or b&q that you can screw to the run on one side and to the shed on the other.