This page is for model railways. Mainly 4 mm to the foot. Below is a link to the model railway club that I used to belong to. We model 4 mm to the foot with a track gauge of 18.83 mm. A direct conversion from prototype sizes.
I have only just found out that the model railway shop. "The Engine Shed" has ceased trading. Apparently on 25 January 2015 they closed their doors. It's now July 2020. Such a shame for many model railway modellers. David, if you read this do drop me an email via the Webmaster on the links page. I hope you are well in whatever you are doing now.
CLAG is short for the Central London Area Group, which is a 4 mm to the foot model railway club (S4 scale standards). Do see the Central London Area Group's web site.