Light locomotive. light locomotives coupled, or locomotive with brake tenders.
Locomotive with not more than 2 brake vans.

Express passenger train, postal train, newspaper train or breakdown train or snow plough going to clear the line, or light locomotive going to assist disabled train.
Officers' special train not requiring to stop in section.

Ordinary passenger train, mixed train, or breakdown train or snow plough not going to clear the line.

Express parcels train composed of vehicles permitted to run at 90 mph or over.

Freightliner train.
Parcels train, Company or express freight train composed of vehicles permitted to run at 75 mph or over.

Empty coaching stock train (not specially authorised to carry Class 1 headcode).

(a) Fully-fitted Company or block train, parcels or milk train.
(b) Ordinary fully-fitted express freight train, with brake force not less than that shown in Section E of the Working Manual for Rail Staff.

Express freight train, not fully-fitted but with brake force not less than that shown in Section E of the Working Manual for Rail Staff.
(From 1974) Empty coaching stock train not fully fitted but with automatic brake connected up and in use on not less than half the vehicles and conveying a freight brakevan as the last vehicle.

Freight train, not fully-fitted but with brake force not less than that shown in Section E of the Working Manual for Rail Staff.

Unfitted freight train (where specially authorised).
Freight train, Officers' Special or Engineers' train requiring to stop in section.