Should I contact police to tell them I was overtaken on a 60mph road about 120mph - and then there was a crash?

I think I know the road your on about!
It's been hideous this week with accidents, and its never usually that bad.
I would say report what you saw to the police on 101, it may help them build up a picture of what took place.

There were several serious crashes yesterday. The one in Essex has a witness appeal out with a number and crimestoppers link. You might want to call them?

If you would like to make an anonymous report, you can contact independent charity on Twitter at @CrimestoppersUK, by visiting their website or by calling 555 111 0800 555 111.
"Please quote incident 234 of 22 January when providing any information to make sure it gets to the right person as quickly as possible."

Obviously you may not have the incident number of your accident, but you’ll be able to give the location.

That's not a dilemma at all. Of course you tell them.

Police usually ask for dashcam images for this kind of thing.

Do you have any?

If you don't know who to contact, try your local police station.

This shouldn't be a dilemma, you really must report it. Someone doing that sort of speed over the limit should always be reported, if only to allow the police to build a picture of where and when things like this take place. Given there was a crash afterwards, this could be crucial information. Even if it's no help, let them decide. Just google the police force of the area where the incident happened, there will usually be a "report" button featured prominently.

And this is why dashcams should be mandatory.

yes I think you should report it.

Yes definitely report this. Google your local police force - Thames Valley or whatever - as there'll be a phone number/email address you can use to submit this sort of information.

I would, plenty of people may have dash cam footage but it will help them build a picture of the journey a vehicle took if involved.

Yes, I would. Why wouldn't you? They usually put signs up after crashes appealing for information anyway. I don't understand what the dilemma is.

100 % tell the police !

The amount of reckless driving I see daily beggars belief, people watch stuff on their phones looking down whilst " driving " , zig zagging in and out of traffic squeezing into tiny gaps etc etc
I have front AND rear dashcams, so glad I do.
What you describe is standard behaviour too, night time racing, witness it all the time.

And God genuinely bless you for that! I still feel bad because a friend of mine, a single mum, had a sister who would slap my friend's dd across the face so hard and it would be so marked (she had long nails) that my friend had to keep dd off school for the marks to heal - I wanted to report her, but my friend said that in that case her sister would cease paying for her niece's private school and I never reported her. I feel awful now, really do.

It’s quite concerning how some adults have no idea how to contact the police in non-emergency situations. Also how they are simply unable to do a quick search. No critical thinking skills whatsoever.

I’d call 101 or log online. Say if you have dashcam footage.

Yes

Many years ago I had a similar experience, but I ended up passing the scene of accident. It was serious. I was convinced the cars that passed me were racing. I stopped and left my name and was later asked to give a statement. I remember having to try to pinpoint details like where I was when I was overtaken, seeing as I didn’t actually see the crash. I would definitely report again in similar circumstances, as others have said, let the police be judge on relevance. Hope you’re ok, it was well over 25 years ago for me but I remember it shook me.

Ignore this bad advice.

I would definitely contact them. You know it was a black saloon and that could be useful information because if a black saloon was involved in the incident the police then have a witness who said a black saloon was driving too fast and dangerously shortly before the crash.

Speak for yourself! If I saw a child being dragged unwillingly I would definitely stop to check. Not everyone is meek.

Tell them. The car may have slowed by the time it crashed and that helps them build a picture. Being able to say "you were witnessed going this fast on this part of road" could give the push they need to get more of a confession about it too.

Yes this is my view too. It could be helpful and if not, there is no loss or negative to you passing on what you know.

I can’t imagine that what the OP can tell them would be remotely useful to the police.

I recently got one as my car was stolen off my driveway 😭 but I need to put it in the car so I will do that today.

What is it with people on here and not using common sense? yes OP, if you use Google! Jesus wept.

I’ve learned I am definitely a gasper. I audibly gasped in the office causing a man at his desk turned round when I saw that the Archbishop of Canterbury had resigned (on the rolling news channel on the screen where the Comms team sits). I’m not even a member of the CofE.