I haven't really been in a pub in England since last August, but at that time I would have said that of the 16 beer engines on the counter only one had a beer that had obvious Cascades in it. The rest were typically 'English' (Scarecrow is super on cask, and is a little different as it's a single hop (Target) ale). Though not a lot of darks now that I think of it.
(Never been to Derry, I'd like to see that place and try the Wetherspoons. Maybe next AGM there? <!-- s:D --><img src="{SMILIES_PATH}/icon_biggrin.gif" alt="

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