Free Card Town and Railway Kits.
 

A large range of free OO/HO card kits are available from Wordsworth Model Railway Card kits.

Very easy to build and can be resized for those like myself that model N Gauge.

http://www.wordsworthmodelrailway.co.uk/

These are very simple kits to complete, but in my opinion the pattern repetition on the brick sheets is too frequent and not random enough. This could of course be disguised by the appropriate application of watercolour.
Backing the printed sheets with card stock ie mounting card will make a nice rigid building.
Thank you Wordsworth Model Railway.

What region are the Signal Box, Engine shed and Station etc based on?

I have nothing to do with Wordsworth other than finding the website while browsing the net.

I believe one of the Signal Boxes are based on Strathspey.

Looks good a variety of Regions including LNWR and Scottish

the houses look a little basic but as low profile they could be of use filling gaps

Will give them a try after I finish the Freestyle Wagon Works I'm doing at present