Thanks for the kind comments folks (and have PM'ed Train Model). They are really fairly basic conversions of Lima Mk 2 coaches, with only the blue & grey set being flushglazed, and using Tri-ang Hornby Hymek power bogies, which was about all I could get cheaply back in the early 1990s. Hope actually to have a layout to run them on later this year, basically a bigger version of my last layout, a double track trainset loop my dad built us and sold back in 1974; except this time it should bear a passing reference to Carrickfergus rather than a quick Airfix model railways accessory catalogue shot.