Well LGW has lost the Hong Kong Airlines & LHR are losing the Air New Zealand HKG from March, so I'd be very surprised if anyone is coming on board to try from MAN.
I'd be very please if they did. I usually go via FRA or MUC- but this week I'm going via DOH.
I think the website maybe just targeting HKG as a destination with connections, of which there are many ; LH, LX, EK, TK, QR, CX/BA & soon VS.