How many employees is a UK citizen and are they all covering the same region?
is a UK citizen refers to Country = 'UK'
SELECT COUNT(T1.EmployeeID), T3.RegionID FROM Employees AS T1 INNER JOIN EmployeeTerritories AS T2 ON T1.EmployeeID = T2.EmployeeID INNER JOIN Territories AS T3 ON T2.TerritoryID = T3.TerritoryID WHERE T1.Country = 'UK' GROUP BY T3.RegionID