Don't be such a pussy!
You may as well do your ATPLs at OATS - nearer to you, plus the chances are you'll get either Oxford or Gatwick as your exam venue. If you get Oxford you can book another week at your B&B, if you get Gatwick you can commute there from H/row area.
PS I passed with BGS without undue hassle. As I said, don't be such a pussy, 1000's before you have passed either way.