State 10 emails of UK Sales Rep who have the lowest credit limit.
UK is a country; Sales Rep is a job title;
SELECT DISTINCT T2.email FROM customers AS T1 INNER JOIN employees AS T2 ON T1.salesRepEmployeeNumber = T2.employeeNumber WHERE T2.jobTitle = 'Sales Rep' AND T1.country = 'UK' ORDER BY T1.creditLimit LIMIT 10