A[L]C said:
Could offer to do privately.
I really wouldn't even consider this given the circumstances.
First of all, post details on
http://www.traffic-answers.com/ - this place is frequented by traffic police and insurance claims handlers who will give you their opinion. Just be aware that civil liability and compliance with the law are two often entirely different things - bear this in mind when considering any responses.
Overtaking on a junction is mentioned in the highway code - it says you shouldn't do it. However, if you emerge across a give way line and cause any vehicle on the major road to do any of the 3 S's - that is slow (change speed), swerve or stop, then you would more than likely be found guilty of driving without due care and attention if the police get involved. In the circumstances you might get a split settlement, depending on the will of the respective insurers involved, but I reckon your driver must accept some blame for the incident.
If you read your policy terms you will find that you are obliged to inform your insurers of the incident ASAP.
Settling privately sounds like a good idea, but is an absolute minefield these days. Bear in mind anyone can claim for injury or other losses 3 years after the event - if you've settled with cash and not informed your insurers they will tell you to settle any further losses yourself and you'll be left high and dry. I had a very minor accident at a roundabout in 2002 where I hit the back of the car in front at single figure speed - he went then stopped abruptly. I accepted it was my fault but offered to have his car repaired (D reg Nissan Bluebird) for him, but for various reasons I got suspicous and went through the insurance on the car (wasn't my own car, it belonged to a company I was doing some work for at the time). They paid £180 for repairs to his car, and a five figure sum for 4 personal injury claims submitted 2 years later. Had I got my mate who owns a bodyshop to repair his car, I would have almost certainly had to foot the £11k bill for the further claims from my own pocket, as by not informing my insurers would have breached the conditions of the policy.
You can always pay your insurers back anything they pay out in terms of claims and retain your NCB.