Jon, I've got some lactose I need to use up some day. Milk Stout is on the schedule for this fall. I was thinking West Yorkshire. But I have no experience with any of the english varieties, only 1728 and the irish. I love the Fullers beers. Would that be your choice in a milk stout? Or is west york a good choice?
Jim, the only two strains (I think) that I've used in milk stout were 1028 (London) and Denny's 1450 - both were great. But I bet either 1728, 1968 or 1469 would do a good job, too. Love milk stout to add coffee to, especially !
EDIT - And Denny's isn't a British strain, but it works great for malty beers.