Atomic Systems

I was checking some steam excursions at http://www.uksteam.info/tours/trs10.htm#vntl

March 1st, 60136 Tornado is hauling an Train out of Victoria (was paddington) to Swansea, it arrives at Bristol Parkway at 1202 and leaves at 1216 but it says Bristol Parkway DL? just wondering what the DL means?

Down Loop. Presumably this is where they will take on water from a tanker or hydrant.

Regards,

Dan