Due to the need to traverse small radius curves on the docks network, it was concluded that a compromise between the shorter wheelbase of the former and greater power output of the latter was desirable, thus giving rise to the requirement for a locomotive with a fixed wheelbase not exceeding 10 ft and maximum power output of around 275 hp to 300 hp (with a weight not exceeding 10 tons).

This is in contrast to other shunter classes that would commonly have had their coupling rods removed and traction motors isolated and would then form part of a train heading in the appropriate direction.

Class 08s were commonly moved in this fashion at up to 35 mph (56 km/h) – overnight wagon-load trains being utilised if possible.

[citation needed] The members of the class that had TOPS numbering applied were also equipped with high-level air brake pipes, allowing them to move Southern Region electric multiple units, and three locomotives were used at Bournemouth EMU Depot for a period.

They were relatively fast for shunters and it was envisaged that they would be used to trip local traffic to/from Southampton docks.

Originally the class had radio communication sets fitted for use at Southampton Docks, the aerial located on the top right-hand corner of the engine bonnet.