I'd like some advice from anyone who has done this. Basically I am able to take 9mm comfortably but don't seem to be able to get beyond that - has anyone else had a similar problem?
Try a 10mm twist drill dipped in butter and set to reverse in a cordless drill, not to slow though, let it get up to full speed before really going for it, let us know how you get on if they let you use you mobile in casualty.
