Like his fellow Westminster felines, Gladstone is a former stray who's been recruited to catch the mice overrunning the department.

When BuzzFeed News heard about the new arrival – who's named after four-times prime minister and chancellor William Ewart Gladstone – we were invited to the Treasury to meet him.

The sleek black cat arrived at his new home at the end of June but the fallout from Britain's vote to leave the European Union meant the public announcement was put on hold.