I have bench tested the locomotive and it works well in both directions.
Hornby OO R2219 SR 4-6-2 West Country Class Blackmoor Vale 21C123 Steam Loco
Hornby OO Gauge SR T9 Class 6-Wheeled Olive Green 729 DCC Ready Tender -Ex R2711
HORNBY 'OO' R3419 SR BLACK Drummond '700' 0-6-0 693
HORNBY 'OO' GAUGE SR 4-6-2 21C119 'BIDEFORD' STEAM LOCOMOTIVE
HORNBY 'OO' GAUGE SR GREEN CLASS 401 2 BIL 2 CAR 106880/12147 EMU *DCC FITTED