You are only missing two parts for the front brake; the stirrup and the fork guides. Those parts are still in use today on bikes made in India and are Phillips pattern. Ebay usually has them. They also require a specific pad that angles inward.
When cleaning it up use very light pressure and a non abrasive cleaner around the pin stripes, they will rub off way to easy.
Chain guards were often a dealer installed option on the older british bikes, it could of had none, hockey stick, or enclosed. Export models seldom used the enclosed ones due to the extra weight increasing duty fees.
My best guess is late forties to early fifties. It took a while for bike manufacturing to resume in England after the war so more likely early fifties. There were some plants in southeast Asia building Phillips bikes around then also. There may be a date stamped on the rear hub.
Nice find and fun bikes to ride. Once up to cruising speed they beg to be ridden far.