It may be early days for Theresa May's new government, but there is already one fierce battle raging between Number 10 and the Foreign Office.

While the Prime Minister and Boris Johnson, the new Foreign Secretary, may have been on different sides of the Brexit debate, Mrs May put their differences aside to appoint her one-time leadership rival to a top cabinet role.

As these pictures show, the pair's feline representatives are not enjoying such a cordial relationship.

