Alright m8. Sorry to hear about your mishap
If I understand this right you were passing a line of stationary/slow moving traffic on a 2-way/2-lane carriageway? If so then filtering doesnt come into it!
Sounds as though you were entitled to overtake and were doing it safely (moving over when traffic approached in opposite direction/at safe speed etc). The car driver should have checked his mirrors and signalled before he changed lanes/performed u-turn - he obviously didnt check his morrors otherwise he would have seen you.
Sounds as though you were driving in accordance with the Highway Code (assuming broken white line), but the car driver wasnt, so you should be in the clear
Get the bike looked at by a dealer/repairer to find out whats damaged and get them to prepare an estimate so you know what costs are involved.
Find out who the other guys Insurers are, they will need to see the repair estimate before they can authorise repairs. If the forks are damaged then they will probably need to inspect the bike, if its just the bracket the costs shouldnt be big and they may just send you a cheque to get repairs done. You will need to pester them all the time if you want this sorting quick!
Also, you only have to pay the excess if you claim on your own insurance. You will only be able to claim on your own insurance if you are Comp and if the damage exceeds your excess.
Hope you get this sorted quick, youve only got three weeks
