From Wikipedia, the free encyclopedia. Oxford Circus is a London Underground station serving Oxford Circus at the junction of Regent Street and Oxford Street, with entrances on all four corners of the intersection.The station is an interchange between the Bakerloo, Central and Victoria lines.rom Wikipedia, the free encyclopedia. Oxford Circus is a London Underground station serving Oxford Circus at the junction of Regent Street and Oxford Street, with entrances on all four corners of the intersection.