The YNU recorder for dance flies (Empidoidea) is:

Roy Crossley, 1, The Cloisters, Wilberfoss, York YO41 5RF. Tel: 01759 388809. E-mail: roycrossley@btinternet.com.  Mr Crossley holds around 10,000 dance fly records (and around 10,000 crane fly records) but only passes his own records to national Diptera recording schemes.

 The YNU recorder for leaf-mining flies (Agromyzidae) is:

Barry Warrington.  Tel: 07732 319723 / 01482 627570.  Twitter: @AgromyzidaeRS E-mail: agromyzidaers@gmail.com

The YNU recorder for all other Diptera is:

Andrew Grayson, 'Scardale', High Lane, Beadlam, Nawton, York, YO62 7SX. Tel: 01439 771226. E-mail: andrewgrayson1962@live.co.uk.  Mr Grayson aims to pass on all Yorkshire Diptera records to the relevant national recording schemes.