The Piccadilly Line is currently partly suspended with no service between South Harrow and Uxbridge due to signal failure at Rayners Lane.
The line is also facing severe delays between Acton Town and South Harrow but there is good service on the rest of the line and tickets are vailed on local buses.
Plus, the Metropolitian Line has severe delays this morning between Harrow-on-the-Hill and Uxbridge also due to signal failure at Rayners Lane.
The severe delays are also creating minor delays between Harrow-on-the-Hill and Aldgate.
Elsewhere on the service, the Circle line is facing minor delays due to a number of train cancellations.
Plus, a section of the Northern line is closed due to work on the track that will last until May.
Commuters can also expect severe disruption throughout the week as the London Underground workers are set to strike across the entire service.
To get the latest updates for the London Underground or TFL networks you can download the TFL app or find out via the website.