Finally got the obdII reader and app. Light cleared by itself prior to that but when it came on again I cleared it with the torque pro app. Fuel economy seemed great after first doing the egr block but now that I've done accurate consumption figures it still sits around 12.5l/100k's.

The power's great but I expected to see some improvement in economy with the engine running so much more cleanly.

I put the chip back in also and contrary to all the claims from the supplier, the economy is worse. It's a little more powerful all be it subtle. It's definitely nicer to drive with the chip but I'm disappointed that the economy didn't improve. I know that I'm pumping more diesel in to achieve the extra power but what they said made sense also, that now the extra power was there that I wouldn't have to change down gears as much and that would increase the economy. They were right about the extra power down low and staying in a higher gear for longer but I was already 'driving miss Daisy' and so haven't gained, but lost about 0.5-1l/100k's.