Since you're looking for an English Lab, maybe you can clear up some confusion. I've heard the term "English" before, but I've heard conflicting definitions. One definition states that English dogs are field bred, whereas American Labs are show bred. The other definition states that English dogs are for show (shorter, blockier/stockier) whereas American dogs are field bred (taller and lankier). I always assumed that the way to differentiate between the two is that an English dog has an accent. You might check out this site on your quest for a pup (they have a breeder listing):
English field bred dogs look very similar to our field dogs although usually they do have a little more "type" than our field dogs. English bred conformation dogs look like our conformation dogs, although generally less porky with more field ability than our dogs. It is not accurate to call any lab with heavy bone/otter tail/short legs "english."
The imports that we generally see are of the field variety. They can be great hunters and pets. Generally they have less fire than american field bred dogs, but that's huge generalization.
The real story with english labs is that there's not much of a difference between them and American labs. The marketing around imported UK labs is incredible. Advertised as the "gentleman's gundog" with classic looks and a mellower temperament, you'd think they were really special dogs. In truth, they're just as likely to be wild as teenagers and any "american" lab and their abilities are not likely to be any more exceptional in the field than any other lab.