Question to the Department for Transport:

To ask the Secretary of State for Transport, what guidance his Department gives to train operators on standards of air conditioning in their carriages.

The Government issues no guidance with regard to air conditioning. All rolling stock is owned by the Rolling Stock Companies (ROSCOs), and leased by the Train Operating Companies (TOCs). If the ROSCO wish to modify their asset while on lease to a TOC then they are able to do so by agreement and will make that investment based on their own assessment of value for money.