Ok cool thanks for that.

I nipped out this evening, it hadnt moved since Friday, it's pissed down today and had started freezing tonight, and it was absolutely perfect. No missing, no getting bogged down when pulling off, and no hesitating.
I'm not getting excited because nothing is ever that simple for me, but I'm pretty impressed. It can't be that straight forward!

Ill have a look at that leak down thingy next if it does it again.