Nice, fairly straightforward, basic grid, but Brown and Gladstone can be swapped directly with each other, between the Prime Minister group and the Bags group - in fact, I'd say Brown really doesn't belong with the bags, while Gladstone could go in either group so should be in the Bag group, not the PMs group. That's not just a red herring, it means there are two valid solutions and it's down to pure luck/mind reading if someone solves the grid, as I did.