DTLR - What does DTLR stand for?

DTLR stands for the Department for Transport, Local Government and the Regions.

ABCB - What does ABCB stand for?

ABCB stands for the Association of British Certification Bodies.

AOCL - What does AOCL stand for?

AOCL is a UK rail term which stands for Automatic Open Crossing, Locally Monitored.