hesitancy/misfire on V12VR

[Ex Boy Racer]

Looking for a bit of advice before I contact my dealer.
On the last 2 journeys in my car (V12 Vantage Roadster, 14k miles) I have had a loss of power and slight misfire at the beginning of my journeys when the car is cold.
I am not accelerating hard (car is cold after all), rather it happens just after I go round a sharp-ish bend quickly. Car stutters, misfires, won't rev or pull. It lasts for about 5-10 seconds and then goes. Once the car is warm it seems to go away.
Any hunches gratefully accepted.

[Ex Boy Racer]

I look forward to it. It's still under warranty so the dealer can fix it.
Ps. There were no warning lights or anything when it happened

[Ex Boy Racer]

Getting things back on track...

I would welcome advice from Independents (particularly as it will be going into BR as soon as the warranty is over), dealers, experts or anyone else!