ALL ROUND PICTURES BY SOLARPIX.COM.**MUST CREDIT SOLARPIX.COM OR DOUBLE FEE WILL BE CHARGED**.**NO PUBLICATION IN FRANCE, SCANDANAVIA, AUSTRALIA AND GERMANY** NO UK NEWSPAPER PUBLICATION - UK MAGAZINES ONLY**.Prince William's girlfriend Kate Middleton pictured as she leaves her London home for work on her 25th birthday this morning...DATE:09_01_07 JOB REF:3208-SFE.