All Week Running times have been revised on some sections of the line to better reflect actual performance. There are minor changes to first and last train times in consequence. A new off-peak service pattern has been introduced during periods of 24tph operation. At the north end of the line, 12tph will reverse at Stanmore and 4tph will each reverse at West Hampstead, Willesden Green and Wembley Park.
Mondays to Fridays The number of trains required for Mondays to Fridays peak service has been reduced by one to 57 trains to support the rolling stock Heavy Overhaul programme. Peak train service frequencies in the central area are unchanged. The new 24tph service pattern will operate during the inter-peak period with 44 trains in service instead of 47.
Saturdays The new 24tph service pattern will operate between 08.00-12.30 with 44 trains in service instead of 48.
Sundays Between 08.00-10.00, the 20tph service pattern has been revised to operate with 12tph to/from Stanmore and 4tph reversing at each of Wembley Park and Willesden Green. 2 fewer trains will operate in this period. The new 24tph service pattern will operate between 10.00-12.30 with 43 trains in service instead of 48.
New timetable eventually available at content.tfl.gov.uk/wtt-17-jubilee-3-october-2021.pdf Only 2% cut in weekday mileage, so probably no staffing implications. If this is the threatened service economies, which sounded quite large, then nothing much to worry about!