Common Saw-tailed Mottle Tipula scripta
The wing pattern seemed quite unlike any other that I'd noticed on a Tipula before and the thorax pattern also seemed quite unusual. The latter isn't diagnostic and the former is apparently quite similar to a couple of scarcer species too. The dark basal spot was less distinct than it apparently can be on this species, but easy enough to see. The genitalia removed any doubt.
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male Common Saw-tailed Mottle Tipula scripta showing wing and abdomen tip (from side and above), Hoe Rough (Norfolk, UK), 26th September 2023