Mo Farah campaigns for Barclays to keep cash transfers
7 August 2013 Last updated at 15:52 BST
Campaigners pressing Barclays to keep open cash transfer businesses to poorer countries have presented a petition to Downing Street signed by 25,500 people, including Olympic gold winner Mo Farah.
Barclays says it cannot police all such businesses effectively and they could be used for money laundering.
Protestors say they are a lifeline for people in countries where there is not a proper banking system.
Farah came to the UK at the age of eight from war torn Mogadishu.
One Somali family which relies on these transfers has spoken to the BBC's Mike Thomson.