What does the fleet number DPL1210 signify, if anything?
Ed: DPL means dual purpose ladder. DPL is used as an abbreviation in the London FB fleetlist to designate an appliance that can carry either the Angus Sacol 464 ladder (later the 13.5m), or the shorter 10.5 (what was the 35' ladder). Hence dual purpose. The terminology came in after the end of the wheeled escapes in the 1980s.
Added by Petros on 18 January 2021.