Protests by environmental activism group Greenpeace prevented nearly 100 Barclays branches from opening on Monday, March 2.
The protest group said that banks continue to fund the oil and gas industry and that, of all the banks in Europe, Barclays is the biggest funder of extractive companies.
Greenpeace targeted 97 Barclays branches in cities including Belfast, Cardiff, Edinburgh, London and Manchester in the early hours, disabling the doors and preventing staff and customers from entering.
“Behind every fossil fuel company is a bank. And Barclays is the worst in Europe, pumping $85bn (£66.6bn) into fossil fuels between 2016 and 2018. So Greenpeace activists are shutting down Barclays branches around the UK in protest,” Greenpeace said on its website.
Barclays said it is working to reopen its affected branches as quickly as possible.
A Barclays spokesperson said: “We recognise that climate change is one of the greatest challenges facing the world today and are determined to do all we can to support the transition to a low carbon economy, while also ensuring that global energy needs continue to be met.
“Greenpeace has a view on these issues to which they are completely entitled, but we would ask that – in expressing that view – they stop short of behaviour which targets our customers, and our colleagues, going about their lives in communities around the country.”