Clarendon represents the terminus of a long since defunct branch situated off the West London Railway north of Kensington Addison Road set in the period circa 1908.

As the West London Railway was part owned by the LNWR in partnership with the GWR, LSWR & LBSCR, it could be assumed that these companies along with the SECR, District Railway and the Metropolitan Railway, could be considered as have running rights on the branch to gain access to this part of London.