I would offer the usual suggestion of checking all your hose clamps (turbo inlet, intercooler, bpv return line etc), the one on the turbo inlet is notorious for loosening itself, I dont know how audible it would be but is the exhaust noticeably popping as the stutter occurs, this is usually synonymous with an air leak as well.
^ Nah everything is nice and tight. All my clamps are good T-bolt ones too.
Its all sorted anyway..... Its just the traction control kicking in. Did some tests.
Thanks to everyone for the input.