The staffer attended a police college event with the PM and travelled on the same flight to Aberdeen before testing positive, forcing them to isolate along with their close contacts.
Jamie Alcock is driving his Shire horses from Gloucestershire to Elgin in memory of his policeman brother who died while protecting the royal family at Balmoral.
Boris Johnson continued Scotland trip despite official testing positive for Covid-19 cnn.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from cnn.com Daily Mail and Mail on Sunday newspapers.
Boris Johnson and Sir Keir Starmer will visit renewable energy projects in Scotland as the country prepares to host the Cop26 climate conference.
The Prime Minister and the leader of the Labour Party made separate visits north of the border on Wednesday and will continue on Thursday.
Both MPs will tour renewable energy projects three months ahead of the international climate gathering.
Prime Minister Boris Johnson met senior officers at the Scottish Police College (James Glossop/The Times/PA)
Global leaders will attend the summit, to be held from October 31 to November 12, in what is seen as a critical moment for the future of the planet.
Scotland s drug crisis: Boris Johnson anxious about safe consumption rooms scotsman.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from scotsman.com Daily Mail and Mail on Sunday newspapers.