Interesting thread. I have been looking at closer at yeasts for more malty English style beers. I got into a rut of using S-04 for all my Browns, Porters and Stouts. I am kinda thinking that I like S-04 better for roasty beers (though I might like Wyeast 1084 Irish Ale better). (I used to brew a bunch of Bitters/ESBs but brew more American Pale Ales and IPAs these days.)
I have started to develop a thing for WLP013 London Ale. I have not used the Wyeast equivalent lately, but the descriptions seem quite different, so I don't know how similar they are.
I just kegged a Porter split with WLP013 and S04. It is not even fully carbed yet, but there is a noticeable difference between the two. The S04 has slight dry tart character reminiscent of an Irish Stout where the WLP013 has more of a rich toffee character which is exactly what I was looking for.
Today I brewed a Dark Mild and pitched WLP013. I am kinda interested in trying out more English yeast, but I am having such good luck with WLP013 and Wyeast 1084 that for now I think I will stick with them (and play around with yeasts for American IPAs).