I am considering the Easi Porch, advertised on UKCS and seems to be very good. My only beef with traditional awinings is that by tensioning the roof poles against the caravan, pulls the awining rail from it's mounting. In my case, (two caravans), it has ended up with water leaks down the inside wall. Apart from the damage of ingress, it is the devil of a job to ease off the awning rail, re seal and re fix, to prevent further leaks.
ive a nearly new bradcot large porch for sale, £250 used 3 times (sale due to disability) very good awning, well made, with lightweight alumiium poles, wheel cover, & curtains, (was £485) anyone interested i'll find out what size it is ok