Silverlink Train Line to be Finally Upgraded?

With last week's news the the government is to take back a little more power over the railways, Mayor of London Ken Livingstone stated that the Silverlink Metro Service (which runs from North Woolwich, through Stratford, Hackney, Islington, Hampsted, and then back down to Richmond) would be the first to be upgraded...

"Given the North London Line is the most overcrowded line in Britain, we would want to take immediate action to increase the number of trains and, as soon as possible, bring in new and longer trains."

'Most overcrowded line in Britain' - don't I bloody know it...