Walking into this pub near the westerly end of Oxford Street, visitors may think that they have time-traveled back to the Victorian period. The bar is indeed from the late 1800s and features historic fixtures like a “snob screen,” a panel of etched glass that swivels, allowing the patrons to have an air of privacy between themselves and those working behind the bar. The Victorian-era apparatus in the Champion is one of only a handful in existence in the United Kingdom. But the real attractions are the stained-glass windows depicting Victorian-era…