Slick
Guru
A good rule of thumb is that if you are inside the M25, you are likely to stray into the ULEZ zone - which is only really a problem if you are driving a diesel delivery van or a very old diesel or petrol car. When you get toward the middle you get the congestion zone. Or drive an EV and don't worry until the end of 2025!
Thanks for the tip, I reckon most of my time is inside the 25, only straying just outside that at Dartford from time to time.