Despite being in her 90s, the Queen is still very much at the head of the Firm and wearing blue may be a subtle way to remind people of her authority.

Reflecting on the Queen’s visit to Scotland, royal commentator Richard Fitzwilliams told Express.co.uk earlier in the week: “The Queen’s current visit, that of the Cambridges ( Strathearns in Scotland) and the Princess Royal, clearly shows the importance attached to the Scottish connection.

“The usual large scale events in Royal Week cannot be held because of the pandemic, but the royal family can show what the politicians from Westminster cannot, an affinity with Scotland.”