Got a student loan? Bizarrely, working extra shifts or getting a bonus this Christmas could COST you cash

Many people may be hoping to earn a bit more cash over the Xmas period. You might be getting triple pay for working on Christmas Day, getting cash for covering shifts of those who want time off or – if you're lucky – simply receiving a nice bonus from your employer. Bizarrely though, if you're a student loan borrower, a festive spike in your income could actually leave you with less money in your pocket...