747-100s departing LHR nonstop for LAX/SFO were a classic for this on warm summer afternoons in the 1970s-80s. BA always refused to put 747s on these routes until the better-powered 747-200B came into their fleet, but Pan Am and TWA, both of whom fully stocked up with the first production models, were stuck with what they had got.
Among other tower comments on a 10R departure were TWA "departing via the Piccadilly Line" and Pan Am "being a Hedge Clipper".