At a mile and a half long, the A304 is one of west London's shorter A-roads.
The route starts on the western side of Chelsea at a crossroads on the one-way, north-east bound A308 at the point where that road changes its name from Gunter Grove to Finborough Road. We set off south-westward along Fulham Road. The road behind us us Fulham Road too, but that section is part of the A308.
The most significant landmarks on our itinerary are Chelsea FC's Stamford Bridge football ground and, shortly afterwards, Fulham Broadway with its shopping centre and tube station. From there, it's a straight run to the junction with Fulham Palace Road (A219) close to the junction with New Kings Road (A308) and Putney Bridge.
Originally the A304 started on the A4 (now the A315) in Knightsbridge and ran down Brompton Road (now the A4) and the whole length of Fulham Road (the eastern section of which is, as noted above, now the A308) to meet the start of its current route.