Might just be an 'odd one' that came over for some reason - maybe even just used as a disposable crate for something and not worth returning when they became redundant over here. Might not even have travelled by rail there at all.
At Dawlish, it is to do with wave-washing - the first one is in London, also a flooding issue, I believe - it occurs all over the place.
They must use a fair-sized eye-dropper, I wounder is it's painted yellow?
This has appeared on the MRSI Facebook page - http://www.traxeditor.com/ - I'm a pencil and paper person, do other more techy types have any opinions on it?
Great stuff.
Of course, there is also Facebook - https://www.facebook.com/KillymardElectricMineRailway/?fref=ts - for those that want to be kept up-to-date regularly...
That's my understanding, too - the centre-lines remain the same, regardless of the track gauge - it's only a loading gauge change that would cause an issue.
A solicitor's/doctor's office is available in 00, depending upon which he needs first.
http://pufferwillies.co.uk/uk2ecommerce/product/bachmann_scenecraft_44-223_oo_scale_low_relief_solicitors_doctors_office/
The real one is only a few miles from me here, I was there last year - I can remember when you could still drive over it.
Edit - Mmm, it says here that it was closed to traffic in 1935, but I have a clear memory of taking a motorbike over it in 1976/7.
http://www.ironbridge.org.uk/collections/the-iron-bridge/conservation-and-restoration/
It says it's about 1:450 - 86x37x42mm (3.4x1.5x1.7 inches).
http://severnmodels.com/epages/eshop1179816.sf/en_GB/?ObjectPath=/Shops/eshop1179816/Products/S1