Quote from their website:
Our wide choice of DCC decoders is complemented by our stocks of UK locomotives to put them in. We have locos from Bachmann, Dapol, Graham Farish, Heljan and Hornby in gauges from N to O. The loco section is well worth a visit with a good choice at competetive prices and a variety of rolling stock too.
Having found your DCC System and chosen locos to control you will need some equipment to install them. We have tools, connectors, cables and consumables to meet most needs.