Social enterprises are organisations that trade commercially but reinvest profits into charitable causes, with Brothers & Sisters already working with Grenfell Athletic FC, a football club set up by Grenfell Tower community members following the catastrophic fire in 2017.

The agency said it was changing its articles of association to stipulate that all profits would be invested in social causes, and its corporate charter has been altered to ensure that shares of the company can only be sold if its not-for-profit status is maintained.

Brothers & Sisters said it was looking for further charitable partners in which to reinvest profits.

The company has also released a film advertising its social enterprise status, which was directed by Rafael Damy and created in partnership with UK production company Birth on a pro bono basis.

Andy Fowler, founder and chief creative officer of Brothers & Sisters, said: “Being independent and relatively small means, we are well placed to experiment more radically with the business, and our clients are really supportive of this move.

“The world faces many challenges, and we believe creativity and kindness are always the answer. So, in our own little corner of ad land, we are hacking the model of capitalism to become a force for good.

“The more successful we are as an agency, the more successful our clients are, the more good we can filter back into these soul projects.”