Metropolitan Line: Minor delays between Wembley Park and Harrow-on-the-Hill northbound only due to a points failure. For Preston Road and Northwick Park, please change at Harrow-on-the-Hill returning on a southbound stopping service. MINOR DELAYS on the rest of the line due to train cancellations. The next southbound departure from Chesham will be at approximately 22:00. GOOD SERVICE on the rest of the line.