British charities would lose more than £200m in funding each year if the UK votes to leave the European Union, according to the Britain Stronger in Europe campaign.
Research conducted by the campaign found that 249 charities received £217m from the EU in 2014, the most recent year for which there are figures.
The data came from the EU’s Financial Transparency system, which shows the organisations that receive funding from the EU budget.
The BSE campaign says that this funding would be at risk should the referendum on the UK’s membership of the EU, due to be held on 23 June, lead to the country’s departure.
The rest of the top 10 each earned amounts of between £20m and £4m from the EU in 2014 and included the British Museum, ActionAid, Plan International, World Vision UK, Mercy Corps Scotland, International Medical Corps UK, the Save the Children Fund LBG and the British Council Royal Charter.
Sir Stephen Bubb, head of the charity chief executives body Acevo, said in a statement: "British charities benefit hugely from our membership of the EU. Not only does it help us work with partners across the continent, fostering civil society, but some of Britain’s best-known charities receive significant funding to carry out their vital work."
Caroline Lucas, the Green MP for Brighton Pavilion and a board member of Britain Stronger in Europe, said: "A huge number of charities in Britain benefit every year from much-needed funding from the EU. The money they receive helps people in need, both in Britain and across the world.
"Outside the EU, there is absolutely no guarantee that this vital contribution to British charitable work could or would be continued."