The fund revealed in its official Survey Magazine that non-euro countries would put up a quarter of all new money under the EU summit deal.

“European leaders agreed to make bilateral loans to the IMF of as much as €200bn —with €150bn contributed by eurozone members and €50bn from other members of the EU,” it said.

The report relied on a briefing by IMF chief Christine Lagarde, who was in the room with EU leaders during last Friday’s summit talks. Britain is the EU’s only large economy outside the euro.