about the question on if you can finish your qxc at another airfield to the one you started with:
an instructor at my FTO said there is nothing that stops your from doing that and it is what he did in south africa when he did his qxc. i myself did come back to my starting airfield but it was not a straight as otherwise i would have flown over central london (heathrow zone).
the last leg i did was from manston to stapleford via clacton and everyone i asked about it at the FTO said it was fine. ive not had the licence issued yet as going to send it all of at one time but from the info i dug up i dout the CAA will have a problem with it.