Branchline stocks a range of different track brand. Pre-eminent is Peco and Hornby,
Hornby supplies track that is compatible with their train sets to extend them to into an empire if that is the way you want to go.
Peco also has a mirror image range to Hornby as well as a range of track work that allows the modeller to turn their train set into a model railway layout.
All gauges and scales are catered for and a range of accessories including point motors, control switches and wiring plus a good selection of how to books.