First lady is facing increased scrutiny as political experts suggest she is behind US president’s recent volte-faces on Gaza and Putin

When Melania Trump arrives in Britain for her husband’s second state visit next month, it will not just be the photographic pack straining every lens for clues as to her opaque mood or signs of froideur in their marriage. It will also be British officials.

Six months into his second term as US president, a period in which Donald Trump has pirouetted on just about every big international issue, mandarins in Whitehall have realised they need to focus less time on trying to tame him, and more on looking at his wife.