Would you report it?

Yes I’d do it,

Please do it Laurely

You will not know if anything is done but in your mind you have done all you can to prevent an accident waiting to happen.

Glad you had a passenger with you.

I'd report it, then forget about it.

Not sure what they can do, but if the car is still untaxed they can certainly chase that up.

I've answered my own question with one online search.
www.gov.uk/check-vehicle-tax you need the reg number (obviously!)
It says, "It can take up to 5 working days for the records to update.", so the car in question may be insured by now.

How did you find out online when the car's road tax ran out? I didn't know that you can do that unless you use a police link.

Yes I would report it.
DH has reported our neighbour many times because he was driving a car without tax, insurance or MOT. We informed the police and DVLA, it took about two years before he suddenly stopped driving one day, must have eventually caught the attention of the police.
Driving a car whilst distracted is unforgiveable.

On this occasion I think I would report it as it is such a stupid, dangerous thing to do.

Yes, I would. Some innocent people could get hurt.

Isn’t it typical that a selfish person like this has no tax on her car. I wonder if she has insurance?

I think you should report it, then you’ve done your civic duty and can forget about it. I sincerely hope she doesn’t kill someone, or indeed herself, with this selfish and irresponsible behaviour.

As a passenger not as a driver, the photo, I mean

Yes I would if I had the number I d probably try and take a photo too

By reporting it you could be saving a life/lives. This person obviously doesn't give a hang.

Yes, I think I would report it.

There will be people who say to mind your own business, and so on, but I would feel a duty to report it. (Blame my mother! She made me like this!)

I think I would report it - I have dealt with too many road accident victims to ever feel it is right to let any incident pass unrecorded.

Do what you believe to be right and then let it go. Remember there are plenty of traffic cameras around that at some point will pick her up so either leave it to karma or report it.