Without evidence you can't prove anything. Without evidence it may well go 50:50.

Enquire if there is any CCTV of the area - Highways Agency may have something.

If you drive a lot invest in dashcams, front and rear facing.

Yes i'm afraid a dashcam is now a must have, not a fashion accessory, unless they are involved almost no one stops any more, understandable in some ways but another nail in the coffin of our once decent country.

One of our chaps was reversed into by Johnny Foreigner in a traffic jam on the motorway at night, much damage, JF starts shouting the odds 'you ran into the back of me', our driver simply points to the dashcam, at which point JF jumps back in his lorry and does a runner.

Sorry OP, the old bill will be of no help whatsoever, it's just how it is now, it might have been better had you been ''hurt'' requiring their attendance, but that is too late now.

As an aside, extreme care should be taken when near any lorry these days, try not to be running alongside one, and never assume by road positioning that a lorry is going in a certain direction, foreign drivers do things differently and there is a mindset among some that anything behind their immediate field of vision doesn't exist (i'm quite serious here, some are very good some are not), so if you're going to go past one do it swiftly and get out of harms way, if baulked by other vehicles ahead in your lane don't go along side one till your exit is clear.