1953 or 54, based on the hub. The hub is 1953, so the bike would be right around then. Sometimes they're dated the previous year and the bike is completed the following year. It's a Birimingham Hercules (a true "Hercules", not a Raleigh-made Hercules). Bike looks to have been over-painted with orange paint, based on the overspray on the top of the headbadge and the lower head tube race. Braces look painted too. But then it's also not missing a whole lot, so it's a good project. Hercules had hubs and shifter branded their own. The innards are very similar to the Sturmey AW, but some of the parts are a bit heavier-duty (e.g., the clutch). It's possible Brampton made the hubs for Hercules.