John, 5% of the near two thousand ships I piloted in and out of Aden, 1955.56, were Blue Funnel and Glens but I don't recall ever having to call upon the Lahej for one of them-does that tell you anything?
To the 13 working pilots amongst whom were ex. B.I.; Clan; N.Z.S.; P&O; B.P.; B.F., and several others that I cannot remember, Blue Funnel ships were a bye-word. Many times I have heard a pilot returning ashore from a difficult job, mopping the sweat off his brow, and exclaiming, "that was no Blue Funnel boat!" I do not exaggerate.
I piloted the Chindwara to sea on the 17th May 1956 at 17.50/18.28: so, John, our paths may well have crossed. I cannot say if she was outward or homeward as that was immaterial to us. The tug used was the Lahej as seen in your photo. (just 38 minutes on board: what a difference I was in for by that time next year when I could be in a ship for more than a day!)