PICCADILLY LINE: Saturday 23 November, between 0100 and 0230, no service between Hammersmith and Cockfosters. Please use Night Bus Route N91 between Holborn and Cockfosters.

PICCADILLY LINE: Saturday 23 November, from 0230 and all day Sunday 24 November, no service between Hammersmith and Kings Cross St Pancras.

ELIZABETH LINE: Saturday 23 November, from 2100, a reduced service will operate between Paddington and Heathrow (all terminals) / Maidenhead. Two trains an hour will serve Acton Main Line, Hanwell, Heathrow Terminal 4, West Drayton, Langley, Slough, Burnham and Maidenhead. Four trains an hour will serve West Ealing and Heathrow Terminals 2 & 3. Six trains an hour will serve Ealing Broadway, Southall and Hayes & Harlington.

ELIZABETH LINE: Sunday 24 November, until 1115, no service between Paddington and Heathrow Terminals 2 & 3 / Slough. Use London Underground connections between Central London and Ealing Broadway / Heathrow, and local buses for West Ealing. The inter-terminal shuttles at Heathrow continue to operate. Iver will not be served. Replacement buses operate: services W1 and W2: Ealing Broadway - Boston Manor (for Piccadilly line) - Hanwell - Southall - Hayes & Harlington - West Drayton - Langley (not served by service W2) - Slough;