In 1862 London & North Western Railway and the Caledonian Railway agreed to provide joint stock for transport between London and Edinburgh / Glasgow. These were lettered WCJS (West Coast Joint Stock), and included passenger brake vans (luggage vans), fish vans, and Travelling Post Offices as well as passenger coaches. WCJS coaches were renewed regularly, every 10-20 years, for old and worn carriages could not be countenanced on such prestigious services. But after this short service life the stock was far from worn out, so it was distributed between the two owning companies and lived out many more fruitful years on less demanding secondary services.