Overview
- New reminders from UK outlets on March 4 stress that undertaking is not explicitly illegal but hazardous examples can be penalised as careless driving.
- Police can issue a £100 fixed penalty and three penalty points when the manoeuvre is judged careless or without due care and attention.
- Some forces may offer a driver education course as an alternative to immediate penalties, reflecting enforcement discretion.
- The Highway Code warns drivers not to weave between lanes to overtake, though keeping pace with your lane in slow, similar-speed traffic is permitted.
- Officers may penalise middle‑lane drivers when the left lane is clear, and motorists who pass them on the left may also face action depending on circumstances.