To be honest, I don't mind contributing to the costs of running this site. I have done that with some other sites I use; it seems a small price to pay for not being bothered by adverts.
I've figured out what is happening. If I whitelist this site in AdBlock Plus, then I get "Share this post", but I get all the adverts as well. If I block all adverts then I don't get it. The same applies to the curved arrow at the right of the header to the quote(s) below it.
I'm not happy, because I don't want to see adverts on my screen.
10,000,000 bytes / 1,024 bytes per kilobyte = 9765.625 kB which can be approximated as 9,770 kB or 9.77 MB. In my time I have seen some software doing that, and I'm wondering if that is what is happening here.
Hornby say that their Prairie tooling suite allows for the 31XX variant also. [Collectors' club magazine, p. 6, top of third column. My copy arrived today.]
The compo in the 4-coach sets had the first-class compartments at one end of the coach, whereas that in the 5-coach sets had them in the middle.
The coaches in these sets are D98 brakes and E131 compos. The 57' coaches in the Cardiff sets were D101 brakes, C56 thirds (later seconds) and E134 firsts.
More information in Great Western Journal, No.5.