The London Datastore recently published on their website the boundary file for the Mayoral Development Corporation in East London. There is quite a bit of background information on the GLA web pages, at this link, but of particular interest is the precise boundary of the Corporation. If you are a GIS user you can download the file and then map it, or, you can look at the map and letter signed by the Mayor of London himself. Alternatively, you can look at my map below and explore the area in Google maps...
By my calculations, this area is 1.88 square miles in size (1,202 acres / 486 hectares) and has a perimeter of 6.47 miles. So, it's quite a big area and bigger than the City of London. It includes parts of the London Boroughs of Waltham Forest, Hackney, Newham and Tower Hamlets and the area has been described (in October 2011) as 'London's single most important regeneration project for the next 25 years'.
The name of the corporation is to be the London Legacy Development Corporation, as outlined in this letter. This is also an example of the Localism Act in action.
I found it quite interesting exploring this area, looking at what is included and (more interestingly) what is not. I hope you find it useful.