Well, boost leak down test was definitely worth while, turns out that the BOV seal wasn't actually in contact with the flange pipe it was mounted on causing a massive leak and a couple of my old hose clamps weren't really working so I was getting some leakage around a couple of silicon joiners. That's all sorted now after re-mounting the BOV and replacing the clamps so the car is idling much happier. Will be nice to have an exhaust system on it though so that I can run it for a while without causing a small riot in my street. Mind you I think the lift pump is nearly as loud as the engine...

Shouldn't be too long before the thing can move again under it's own power crazy talk