Is David Cameron in a position to win?
'Not really' is the short answer.
The current Jupiter-Neptune-Chiron conjunction is opposite his Mars, so he's probably having more than a few delusions (Jupiter-Neptune-Chiron) about his prowess, vigour and leadership (all things which Mars represents).
With Neptune stationary too, there's a standstill and a reversal going on, where things are likely to unravel further in due course.
He doesn't have a green light to go forward; few do, since it's time to take a look back before we can proceed.