Possible Callomyia elegans? ID advice greatly appreciated

Certainly a Callomyia male - either amoena or elegans. I find it difficult to see the characters that distinguish these two in the photos. I suspect it is amoena, but it would be good to hear other opinions!

Thanks for replying, Tony.  Yes, it is amoena - Donald Smith passed one of the images on to Peter Chandler and he said it is probably amoena.  I managed to capture him a couple of days later and take a series of much closer photos (although photographing him in the fridge was not ideal!) and yes, these photos clearly show grey markings on the fore edges of the abdominal tergites, not the hind edges.  Amoena he is, but still a lovely fly nonetheless.