NEWMARKET, UK—Britain's Home Secretary Priti Patel MP paid a surprise visit to Tattersalls on Tuesday and will doubtless have had impressed upon her, by those depending on international trade ahead of the major sales of October and December, the importance of lifting quarantine restrictions for incoming buyers. In the current climate, it is impossible to imagine the packed sales ring at Tattersalls on a dark, crisp December evening as a potential blockbuster mare comes under the hammer. Hopefully we will return to those moments of thoroughbred theatre in time, and...