The light came back on the next day after i cleared the dtc's. I spoke with Ian at Pipewerx and he knew what the problem was straight away, he had drilled and bunged a hole after the cat and then placed the o2 sensor in another position about 6inches down, he told me to swap the 2 over which i have done and the problem is solved
I also took a few pics (although sh*t ones) whilst under the car if anyone is interested?
Chris