OK, got the camera out now. This is the mysterious pipe I was talking about -
You can see in the middle of the pipe where it splits using a T junction piece. There was a rubber pipe the same width as on the other ends but I took it off to try and get a match at the local motor factors tomorrow.
The next pic shows where the other end attaches. You see the condenser type thingy just behind and under the valve fluid bottle tied to the air filter neck? It fits on the right side of that (out of shot).
One more thing, when taking these pics I noticed there seems to be something missing off the bottom right side of the block, taken a photo as best I could (below). Whats meant to be bolted in here? There are two bolt holes and it looks like there has been something there in the past, just dont know what its meant to be. Certainly not anything I have taken off or it would be in a bag in the boot waiting to go back in at a later date...
Any help would be greatly appreciated!