What does LDF and LRL mean in British?

"LDF" and "LRL" are not commonly used abbreviations in British English. They could have specific meanings within certain industries or contexts, but without more information, it's impossible to say for sure.

Could you please provide more context or information about where you encountered these abbreviations? For example:

* What was the topic or subject being discussed?

* What kind of document or source did you see them in?

* What was the surrounding text or conversation?

With more information, I can help you determine the meaning of "LDF" and "LRL".