Southall Black sisters are holding a protest on Wednesday morning in front of Parliament.

It is a Day of Action on their No Recourse to Public Funds Campaign.
High on Rebellion explains:

At the moment, women (like myself) who are in the UK on a spousal visa are not allowed recourse to public funds, including housing benefit and income support. If these marriages become abusive, this means these women have nowhere to turn. Most women’s refuges collect housing benefit on behalf of their inhabitants in order to remain open – they literally cannot afford to take in women who are not allowed access to benefits.

Details of the protest from Jess McCabe at thefword (one of my favourite blogs):

The plan for the Day of Action is to assemble at 11.00am for a demonstration at 11.30-12.30 on the Embankment opposite Portcullis House, Westminster, London (nearest tube Westminster) we were not able to get permission to gather in Parliament Square. A big, bold and beautiful banner is being made by an Amnesty artist. Please wear black on the day.

The public meeting will begin at 1pm in Portcullis House, details of the speakers will follow shortly.