Just an update;
I purchased a cheapo vagtacho off ebay for £20.
I told it my ECU and it successfully connected to the ECU.
However, it failed to read the pin (SKC). GUTTED!
Instead, I selected the try any ecu button.
Vagtacho connected to a few other ECU types but failed to read the pin still.
Third attempt, Vagtacho give me the 4 digit pin number, but was it correct?
After entering it in the wrong area of Ross-Tech a few times, I finally read the manual and realised I needed to enter it into instrument module. The SKC was accepted (with an additional 0 added of course (0xxxx)).
My car now drives after two weeks off road.
So if you aren't getting anywhere with Vagtacho, play around and be patient.
If anyones interested I used clusterrepairs.co.uk for my dash repair.
They seem very professional and helpful. The dash hasn't been installed for more than a few days, but it seems to be okay.
The lcd are a little distorted for some reason, but it was like that previous and it's not much. I was also told about this before they returned the unit and I said, whatever.