Oh brilliant - that's just what I was looking for - top man. There was speculation on 246 of either header tank or thermostat and I've noticed a few drops from the tray under the right hand side and under the header seemed dry from everywhere I can see. I'd happily do it myself but seeing as I'm looking to get the car serviced and MOT'd in the New Year so I'll probably just ask them to do it at the time.
Night Blue Metallic S6 5.2 V10
Hibiscus Red Metallic S4 (B5 99.5) w/AmD Stage 1 Remap, RS4 Exhaust w/ Gutted Precats & R32 Tailpipes, Afterun Sensor, H&R Coilovers