Railways (Conveyance of Mails) Act 1838

Royal arms to be painted on carriages provided for the service of the Post Office.

10. On all carriages to be provided for the service of the Post Office on any such railway there shall on the outside be painted the royal arms, in lieu of the name of the owner and of the number of the carriage and of all other requisites, if any, prescribed by law in respect of carriages passing on any such railway; but the want of such royal arms on any carriage belonging to or used by the Post Office shall not form an objection to such carriage running on any railway, any thing to the contrary notwithstanding.