Burberry London seems like the classics line of Burberry with the Nova Check and Classic Check covering everything, the only thing updated are like the handbags and some outerwear.
Burberry Prorsum is the newer (?) line that consists of RTW that is shown on a runway.
It's like Classic Versace and Versace, one is not updated all the time the other is every season.
I remember I wanted a red Nova Check poncho from Burberry London, it was really nice it had buckles around the neck and had a nice shape. When I tried it on I came to my senses, it was terrifying.
I think the Nova Check is alright but it gets brutally overdone since in my school everyone who thinks they're sophisticated wears Burberry something. It gets to that point where it goes from being great taste (which it is) to very bad taste (which it is now).