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OK, to me the correct area of the wing is now being looked at and it does have the necessary minute hairs. If I remember the key correctly you only look for hairs if you are happy that it is not P.nemea and this one has a blue/grey parafrontal so it shouldn't be P.nemea ... and looking back at photo 1 there do appear to be orange/brown abdominal side patches so ... male genitalia aside ... to me this looks fairly like P.heraclei but I would still recommend putting in the extra work to prove it by relaxing the specimen and hooking the genitalia out :)

P.heraclei is the third commonest Phryxe spp. in Britain, in my experience - followed by magnicornis & erythrostoma (both of which are very rare)