Please someone correct me if I'm wrong but I always thought that it wasn't possible to use the CCR (or indeed any T5 lounges) if transiting from a T5 arrival -> T3 departure.
A fairly well known youtube poster recently uploaded a video of them arriving from NYC in F, spending some time in the CCR after going through T5 flight connections and then somehow getting a bus to T3 for their flight to Cape Town. I did not know that this is possible?
Also, they took a baby with them, although the issue of a baby flying F has been done to death already.
Here is the video:
https://www.youtube.com/watch?v=D-fQ...ature=youtu.be