The Highway code is not law, but may be quoted in law as description of best practice. That's what I was taught. On the matter of driving to the road conditions , let me share with you last Tuesday, my Perfect day. As you know I drive a bus currently around an area whwere the main road signs are Width not to exceed 6' 6'' Except for acess. Incedentaly the lanes also provide a short cut to A2 and M25,. So one part is single track with passing places and a nasty bend into it that narrows around the bend. I always keep in the hedge and creep around it. Then coming towards me , the Mercedes SUV snow white, with black roof. Driven by blonde, with sun bed tan, dark glasses, despite the rain, white dress.- and coffee cup in left hand. Sees me hits the brakes, cup tips forward, lid flies off- and a lovely brown wave follows the lid. 😂