Thanks everyone. My younger son is also enjoying this new (for him) hobby.
I know, there is an amazing range of Irish railway stock now. It is actually what is spurring me on I think! I do still have plenty of old Hornby buildings, platforms and some nice BR locos from my young fella days, but I dont want to get rid of them so I am just going to blend them in!
I got three BR mark 2 coaches from ebay for a song with the intention of spraying orange and black, but I am not sure if they are the right type of mark 2 ... didn't realise there were 2a 2b 2c 2d ... oh well