Unfortunately I can't see the picture on my I-pad, but Autair did lease GAPWA for a short while, but the 3 they bought were WB, WC and WD.
Yes, G-APWB/C/D were the ex-BEA aircraft, used by them on the Highlands and Islands routes. They (BEA) never operated PWA, except on proving flights, although that now survives wearing BEA colours at the Woodley museum.