Following a recommendation on this very thread I bought one of these:

https://www.circuitspecialists.eu/csi-premier75w-digital-temperature-controlled-solder-station-with-75w-soldering-iron/

I find it ideal as it has three presets so I have one set for white metal, one for brass etc.

More than happy with it. 

Can anyone shed some light on the types of wagons that would have been used on the various trains to baglan bay please? 

I'm primarily interested in the early 70's but any information would be great.

Cymmer Afan Valley 1966 by Ray Viney