Spring has sprung in London and it's time to kick off a new season of London Landscape TV episodes.

We've just enjoyed hosting the 2010 London Marathon and on the day I went down to film along part of the route in the East end of London.

The episode starts in Poplar Park, a beautiful community park serving the relatively poor area of Poplar. Looming beyond the park, though, are the mighty towers of London's new financial district known as Canary Wharf.

The park looks peaceful, but hidden amongst the natural springtime birdsong are echoes of what sounds like music and an amplified human voice.

We observe echoes of Poplar's dark past, when some of its children died from a bomb in World War I. Now an angel watches over their memorial against a blue and white sky.

Soon we discover the source of the voices and cheering: just south of the Park is the route for the 2010 London marathon, and we watch runners plying their way along Poplar High Street. But where are they running from?

The answer lies in the mighty financial towers - the marathon runners are making their way to Poplar from Canary Wharf. So we leave the low brick housing of Poplar and arrive, via Billingsgate Market, to the home of the gleaming towers at Canary Wharf itself....