Do not go for 50:50. This has happened to me, so I speak from real experience.
Someone pulled out onto a roundabout, in front of me, I had to swerve to miss them and bashed the curb, mangling the front wheel & suspension up. No damage to the other car.
They denied all responsibility, I maintained it was 100% their fault. The insurers decided to go to court, and it got as far as everyone being there, on the day. The opposing solicitors(?) went into a 'pre-trial huddle' and I was advised to accept 50:50, on the grounds that the judgement may go against me. As they were the professionals, I agreed.
It later transpired that in fact the solicitors then agreed 25:75 against me. I didn't find this out till months afterwards, almost by accident. When I tried to dispute it, my solicitors had 'lost all the paperwork'. So I was stuck with it.
If you think you are in the right, dispute the case in front of the judge; I wish I had, I think I'd have won outright.
You stick to your guns.