Cleanly malty with a drying finish, perhaps a few esters, and on occasion a faint bit of peaty earthiness (smoke).
BJCP 2008:
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Examples:
Orkney Dark Island, Caledonian 80/- Export Ale, Belhaven 80/- (Belhaven Scottish Ale in the US), Southampton 80 Shilling, Broughton Exciseman’s 80/-, Belhaven St. Andrews Ale, McEwan’s Export (IPA), Inveralmond Lia Fail, Broughton Merlin’s Ale, Arran Dark