Three Royal Bank of Scotland branches across Ayrshire were targeted by protesters last week.
The Irvine, Kilmarnock and Ayr outlets were leafleted by the Ayrshire Campaign for Nuclear Disarmament (CND) as part of its day of action on Friday, April 8.
In a bid to stop Scottish banks 'funding the end of the world', the Ayrshire CND group delivered literature and asked the region's branches to reconsider their support to companies building nuclear weapons.
Secretary of the Ayrshire Campaign for Nuclear Disarmament, Arthur West, said: "The latest available figures show that the Royal Bank lends the colossal figure of around £2.3 billion pounds to the nuclear weapons industry.
"Given that any use of modern-day nuclear weapons would cause massive environmental and health consequences, it really is time for Scotland’s biggest bank to consider its support for these weapons of mass destruction.
"The bank already steers clear of giving financial support to cluster bombs and land mines – it is now time to add nuclear weapons to this list.
"Our local group supported the day of action and we helped deliver letters to several Ayrshire RBS branches asking them to reconsider their support to companies involved in building nuclear weapons."
In response, a NatWest Group spokesperson said: “We have robust policies and processes relating to the defence sector through our environmental, social and ethical risk management framework.
“Our policies reflect adherence to national and international laws and regulations, wherever they apply. We have also incorporated a number of voluntary standards such as the Equator Principles and the UN Global Compact.
“Our defence policy statement was last updated in September 2021 and we maintain a regular dialogue with NGOs and campaign.”
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