Keying from Alan Stubb's British Craneflies I get this to a choice of Phylidorea ferruginea or P. longicornis. Seems to have a mix of the supposedly differentiating characters. Vein Rs is short like the plate for P. ferruginea and wing quite long. Also top of head grey dusted. But femora with strong black apical ring and suggestion of infuscation around base of Rs and crossveins, more like P. longicornis. Beds marsh. 20 April 2022.
Looks like ferruginea to me Colin. I can't see apical rings on the femora?
You are right. Femora have a very small dark mark at the tip of the dorsal surface only. The dark apical ring I was seeing is at the tip of the tibiae. Silly me.