Piccadilly Line: No service between Rayners Lane and Uxbridge due to poor rail conditions caused by significant leaf fall. SEVERE DELAYS between Acton Town and Rayners Lane. MINOR DELAYS between Acton Town and Heathrow Airport due to an earlier signal failure at King's Cross St. Pancras. MINOR DELAYS Arnos Grove to Cockfosters GOOD SERVICE on the rest of the line. London Underground tickets will be accepted on London buses, Elizabeth line, Great Northern and London Overground.