Commuters are facing further delays on the Piccadilly line at the start of this week.
Transport for London (TfL) said there will continue to be "severe delays" on the line this morning (December 12), because some trains on the line have been taken out of service so their wheels can be repaired.
This means a reduced service is operating on the line.
London Underground tickets are being accepted on local buses, Chiltern Railways, Great Western Railway, South West Trains, Great Northern and London Overground.
Customers using stations between Ealing Common and Rayners Lane should change at Acton Town, TfL added.
And customers using stations between Rayners Lane and Uxbridge should use Metropolitan Line services, it said.
A shuttle service train is operating between Acton Town and Rayners Lane, with a reduced bus service operation between Acton Town and Rayners Lane.
There are also minor delays on the Central Line due to a shortage of trains, TfL added.
If the tube was over 15 minutes late, passengers can claim a refund on the TfL website .
They will be backdated to November 24, but in an unfortunate piece of irony, TfL has said due to the large volumes of people, the money will take time to refund.
On the TfL website, it states of the Piccadilly line: "We have had to take some Piccadilly line trains out of service to repair their wheels, which means that we do not have a full fleet available.
"Therefore, a reduced service is operating on the Piccadilly line.
"Please allow extra time for your journey or consider using other routes.
"We are working around the clock to make the wheels safe, so that we can return to a good service as quickly as possible."
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