Hi Cidered There are many routes from ED to Oxford Circus as you probably have gathered by now. For information re. the overground arriving at ED please go to the transport for london website under the overground heading. I'm using a notebook at the moment and have no idea there the copy and paste facility is so I cant do you a link at the moment! but it is very easy to find it. At present, if you are keen to travel on the overground, you can take several buses from Lordship Road towards Forest Hill and take the overground there to Canada Water and then Jubilee Line to Bond Street. Be aware that Canada Water is congested during rush hour though! The Clapham extention of the overground will be stopping at Peckham Rye and Denmark Hill from 2012 but this will be no advance to the Victoria and London Bridge trains we go now. Probably the quickes way is bus to Dermark Hill, train to victoria and then victoria line to oxford circus. You can check the Route planner at the TfL website as well for different alternatives. Hope this adds any value to you question