Tomorrow the March with the Homeless demonstration is being held. Their social media indicates a 18:00hr start time.
The march starts at Downing St and ends at the Southwark Council offices on Tooley St (near London Bridge).
Protestors have been encouraged to bring tents and sleeping bags as they intend on staying the night outside the offices. The estimated time of arrival at Tooley St is 21:00hrs.
Their social media so far indicates over 760 have said they will be attending. The link below contains full details.

http://streetskitchen.co.uk/marchforthehomeless-15-4-15/