Saturday evening in London and South East England is expected to be mostly dry, but visibility still deserves a deliberate reset before driving. The Met Office regional forecast updated at 16:54 BST says showers should fade, winds should ease and clear spells should develop. An isolated light shower remains possible at first, while a patch of mist or fog may form later towards dawn. That combination makes clean glass, working lights and a calm driving plan more useful than simply assuming the weather is settled.
Start with a clear view from the driver's seat
Clean the outside of the windscreen, side windows, mirrors, headlights and rear lights. Then clear any film from the inside of the glass, because it can scatter headlight glare and make an otherwise clear evening harder to read. Top up screenwash with the correct mixture and check that the wipers sweep cleanly without smearing.
Use the heater, air conditioning and demister before moving if condensation has formed. Do not drive while looking through a small cleared patch. A fully clear windscreen and correctly adjusted mirrors are basic controls, not optional comforts. If a wiper blade is damaged or an essential lamp has failed, keep the vehicle parked until the fault is put right.
Use the right lights for the conditions
Turn on headlights when visibility is seriously reduced, generally when you cannot see for more than about 100 metres. In fog, slow down before entering the reduced-visibility area, use windscreen wipers and demisters, and be ready for other road users to appear later than expected. Fog lights may be used when visibility is seriously reduced, but they must be switched off when visibility improves so they do not dazzle other drivers.
Dipped headlights improve your ability to see and be seen after sunset. Check the dashboard indication and do not rely on automatic lighting alone to make every decision. Avoid staring at approaching headlights; reduce speed if glare or wet reflections make the road difficult to read. Keep enough distance to stop within the space you can see to be clear.
Allow for a damp patch or a late shower
Even a brief shower can leave reflective surfaces and increase stopping distance. The Highway Code says stopping distances are at least double on wet roads. Increase the gap, accelerate and brake smoothly, and watch for spray near larger vehicles. If a gust catches a cyclist, motorcyclist or horse rider, leave extra room and avoid a close overtake.
Check live weather and traffic information immediately before leaving, because the timing and location of showers or mist can change after publication. If visibility deteriorates rapidly, find a safe, legal place to stop rather than trying to maintain the original arrival time.
Secure a small readiness kit
Keep a high-visibility vest where it can be reached before stepping out, and secure any emergency pouch so it cannot roll into the footwell. A torch, charged phone and warm layer can make an unexpected wait more manageable. Everyone who uses the car should know where the equipment is and should read its instructions before an emergency.
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The compact kit combines a high-visibility vest, warning triangle and emergency window breaker with seatbelt cutter. Secure it in the boot and keep the vest accessible. Use a warning triangle only where it is safe and legal, and never on a motorway.
Finish with a two-minute departure check
Confirm the windscreen is fully clear, lights are working, mirrors are clean, the driving position is correct and passengers are belted. Remove loose items from the cabin and make sure the boot is closed. Set the route before moving, allow time for a slower journey and take a proper break if tired.
A mostly dry forecast does not remove night-driving risk. The useful habit is a repeatable visibility check: clean glass, correct lights, extra space and a willingness to slow down when conditions change.
Sources: Met Office: London and South East England forecast; The Highway Code: driving in adverse weather; The Highway Code: using the road; THINK!: vehicle safety checks.
