Excellent report Simon.
Ive heard rumours in the not to distant past of plastic sleepers being trialled on NR infrastructure. Given the Americans 31 ton axle load, it should be a breeze to use them here I would have though?
We shall see.
I had a few trips along the FR must be some 33 years ago now! I can definitely recommend it, its a stunning and very interesting ride.
Its funny you mention the confusion with the clips, you'll quite often see the same thing done (wrongly) on the big railway every now and again.
E Clip = tail on the rail, Pandrol 401= tail on the sleeper / housing!