Definitely JUST wait. Do not email, call or check on your status. Don't ask if they rank the waitlist. Schools often will update you so it's a "don't call us, we will call you" situation. Good luck.
Have you looked into the Windsor JD Dual program? You'll get to practice in Canada and the States, tuition isn't that bad (compared to the UK), and they accept plenty of applicants around your stats.
Depends on the school's policy. If they send acceptance and waitlist notifications by email and you haven't received one, chances are a rejection letter is on your way.