It seems to be more of a regular occurance lately that Midhaul A\C are operating on Shorthaul routes. Today for example:

A320/G-MEDH
BD81 BHD-LHR
BD193 LHR-NCE | BD194 NCE-LHR
BD58 LHR-EDI | BD61 EDI-LHR
BD62 LHR-EDI

A321/G-MEDF
BD572 LHR-MAN | BD571 MAN-LHR
BD167 LHR-BSL | BD168 BSL-LHR

A321/G-MEDL
BD582 LHR-MAN | BD585 MAN-LHR

A321/G-MEDN
BD129 LHR-DUB | BD130 DUB-LHR
BD131 LHR-DUB

Similar tomorrow too:

A320/G-MEDH
BD51 EDI-LHR
BD578 LHR-MAN | BD573 MAN-LHR
BD58 LHR-EDI | BD61 EDI-LHR
BD62 LHR-EDI

A321/G-MEDG
BD50 LHR-EDI | BD53 EDI-LHR

Few the rest of the week too. Enjoy them while you can ^