For a traditional "English" blend, as it is defined in the US, I would recommend Dunhill Standard. It's more latakia forward than London, and pretty much sets the "standard" for that sort of blend. Dunhill MM 1938/MM Baby's Bottom (what it says on my tins) and Peterson Old Dublin are also personal faves. The Dunhill is a bit more Oriental forward, and the Peterson has a bit of unsweetened cavendish.
Moving further afield, White Knight and Balkan Sasieni are both excellent blends that have come close to the legendary Balkan Sobranie OSM of the early 1970s, when I discovered it.
I've never had much success in finding a "cross-over" English that works for me over the long haul, but SG Navy Flake is one that does.