Services on the Docklands Light Railway were disrupted this morning, after a man protesting the DSEi arms fair strapped himself to a train.

DLR trains were suspended between Canning Town and Beckton Park because of the so-called 'passenger action'.

This meant trains were not stopping at Custom House, for the ExCel centre - where the The Defense Systems and Equipment international exhibition (DSEi) is being held.

This was the second incident today, after westbound DLR services suffered power cuts when protesters chained themselves to 'vehicles'.

The Met Police have confirmed they have sent more police to the arms fair, in anticipation of heightened activity by protesters.

The DSEi has attracted criticism from diverse groups, including local churches and the Campaign Against the Arms Trade (CAAT).

More than 2000 Met police are to attend the event today, with 300 more officers from British Transport Police.

Possible targets for protest are believed to be transport links to and from the venue.

Yesterday's protests led to more than 50 arrests for offences including sit-down protests in roads leading to the ExCel exhibition centre, possession of cannabis, criminal damage, and possession of an offensive weapon.

A police spokesperson today said the Met was 'not prepared to speculate' about the tactics of demonstrators at the arms fair today.

DAC Andy Trotter, in charge of policing the exhibition, said yesterday, ""We are expecting tomorrow to be more challenging as we are aware of a number of groups who have expressed an interest in demonstrating at the site but we have planned well for this event and I'm confident we can handle any eventuality."