The QXC is a very liberating experience. My instructor reckoned that in many ways it's more important than the skills test, because it's more of a test of being a pilot as a whole.
I did Stapleford-Shoreham-Lydd-Stapleford and having left Shoreham encountered ever-decreasing cloudbase, all around me, finally below my safety height. I did a 180 and returned to Shoreham. It turned out to be an isolated episode of cloud and after an hour tried again and it all worked out fine. Beware of the urge to carry on if the weather deteriorates. Does anyone else know how common an extra landing is on the QXC?
Also, beware of the changing weather. On the final leg, the wind had picked up quite considerably and this made a big difference to my course headings.
However, it's a great experience and during the PPL course, probably the most satisfyling after first solo.