Well, last evening Peter and Christine came round for coffee and for me and Peter to run the trains. A bit of a chaotic start as Peter had forgotten to bring the hand control, plus both steam locos use the same chip. I had spare chips and a spare hand controller but no spare batteries for the controller, so Peter had to go back for a battery (he only lives about six doors away). Meanwhile, Diane and Christine were in the warm inside.
During the afternoon I'd got the passing loop at Pond End complete apart from two of the small extender pieces which Peter brought round. These were put in place under arc lights:

and then the job finished off:

I'll post pictures of the actual loop later.
We got both locos running but by now it was too late for photos and, in any case, it is far too difficult controlling a loco and keeping a watch on what a second loco is doing to take photos as well. The passing loop worked OK but is too short for anything other than a loco and two trucks or carriages.
There was some excitement which illustrates the difficulties of running two trains at once when I was distracted by Peter's train with the result that mine went through the buffers at the Seaport terminus. (I haven't used any track connectors so far, but clearly they are needed at the buffers at least.)
There was further drama at the Beachown terminus when Peter stopped a coach straddling the points and when he set off the coach tried to go straight on and right at the same time! He quickly reversed the direction of travel which derailed the coach and it disappeared over the side and into the pond! It was fished out safely (roof and carriage body had separated but both were retrieved before they sank out of sight) none the worse apart from being wet and trailing a bit of weed. Diane took it into her care, drying and washing and leaving it to dry near a radiator. A quick oil on the axles and it will be 100%.
Overall, an enjoyable and successful evening.