For those in and around London (UK). The ULEZ charge zone is expanding beyond the A406 to cover everything within the M25. To avoid paying the £12.50 per day charge get a ULEZ exemption from National Emissions Test Centre at E3 2TB. It costs around £400/- to get the test plus getting a Cat converter fitted which makes your vehicle compliant. You will recover your cost in less than a year even if you are only a weekend rider. Of course, if you live outside London you don’t need to worry.