Andy,
you can go in various directions but the main question is what do you exactly need or want the awning for? Are you after something for long or short stays?
Do you plan to have people sleep outside? When we can finally travel again do you plan long hot continental trips? Do you just need a shade to keep sun or rain off the door side? Would a lightweight low campervan type awning be acceptable? Answer these and the advice/choice is a lot easier.

Colin

A 2.5m Isabella Shadow is worth considering, lightweight and quick to put up it copes well with sun and if you either pull the centre down into a v or add another pole to raise the centre sheds water well. Our favourite is the Fiamma Caravanstore. You would need a 225, which has a bag length of 236cm. The straight run on your awning track is about 249cm. This can be left in when travelling, you unzip the bag, roll out the canopy and after dropping the legs fold a couple of roof braces back. It is totally water resistant and can be put away wet. the problem is the bag does foul the door when opening. We run with one of these permanently on the reverse of the van to protect bikes, clothes rail, second fridge etc.
Another option is the Sunncamp Swift. This is a lightweight open fronted "tube" and more suitable if you know the weather is going to be poor. You can now get a version of this with a zip up front and would be my choice if I was buying now to supplement our Isabella.
For short breaks and when away last summer touring across 6 sites over 3 1/2 weeks we used the Shadow and the Sunncamp.
For a long pitch we use a blow up awning. The Kampa [290 model for you] is a good compromise if a bit of a heavy to get into the track
If you se the search facility lots of photos should come up, but these should help for a start.

Isabella Shadow.jpg - Bild entfernt (keine Rechte)Sunncamp Swift.jpg - Bild entfernt (keine Rechte)Caravanstore door side.jpg - Bild entfernt (keine Rechte)Caravanstore other side.jpg - Bild entfernt (keine Rechte)Kampa.jpg - Bild entfernt (keine Rechte)

Colin

Julia, we have since 2003 permanently travelled with a Caravanstore in the awning rail. For the first 4 years it was on the door side. It was then on the door side on a higher rail bonded to the roof and for the last 10/12 years it has been on the opposite [bathroom] side. Here it offers excellent protection for bikes, clothes airer, 2nd fridge if the sun is on the door side etc. Our rail is fine with no movement.
It is not used on the door side. Here we use an Isabella Shadow for shade, a Vango Siesta as a quick small awning or a Kampa Pop-Air for long stays.

Colin