Hi Sylvia
If you click on the search button, top right of the home page, click on the down arrow and select members from list. Type in Gazza and search.
click on the Gazza icon and you'll see the postings for the roof rail and canopy fixings.
Basically I have used tool magnets from Lidl which slot on the top of the camper and keep the awning in place. I generally use three, I find this is plenty.
They are super strong and will withstand very strong winds!
They're also relatively cheap, just a couple of pounds each. I noticed our local Lidl store have them in now.
Just be careful not to get your fingers trapped in them, it hurts like hell!
Let me know if this helps or you need more information, pictures etc.