FlyerTalk Forums - LGW & LHR selected 777s go 10-abreast (3-4-3) in Y 2018 onwards

Configurations (with links to AeroLOPA seatmaps, where available):

777-200ER
32J 48W 252Y (code 77S)
32J 52W 252Y (code 77T)
14F 48J 40W 134Y (code 77R)
48J 40W 184Y (New Club Suite) (code 77L)
8F 49J 40W 138Y (New Club Suite) (code 77M)

777-300ER
8F 76J 40W 130Y (New Club Suite) (code 77H)

Updated 777 aircraft now in service:

LGW Based Aircraft:
Completed (re-entry to service date):
G-VIIX - 08 March 2018
G-VIIR - 20 April 2018
G-VIIO - 23 May 2018
G-VIIP - 25 June 2018
G-VIIT - 07 October 2018
G-VIIU - 07 November 2018
G-VIIV - 25 January 2019 (currently operating from LHR)
G-VIIW - 02 April 2019 (currently operating from LHR)
G-YMMC - 15 May 2019
G-VIIY - 04 June 2019 (currently operating from LHR)
G-YMMF - 03 October 2019

G-YMMD - 01 November 2019

G-YMMB - 20 November 2019

G-YMME - 14 December 2019

G-YMMA - 14 July 2022

LHR Based Aircraft:
Completed (re-entry to service date):
G-RAES - 08 October 2019
G-VIIL - 31 January 2020

G-VIIK - 02 March 2020
G-VIIM - 20 March 2020
G-VIIN - 14 April 2020
G-VIIB - 25 April 2020
G-VIIF - 15 June 2020
G-VIIS - 12 July 2020
G-VIIC - 08 September 2020
G-STBM - 01 October 2020*
G-STBN - 05 October 2020*
G-YMMI - 08 October 2020
G-VIIG - 28 October 2020
G-STBO - 06 January 2021*
G-STBP - 08 January 2021*
G-VIID - 28 February 2021
G-YMMN - 04 March 2021
G-YMMO - 21 April 2021
G-VIIE - 29 April 2021
G-STBD - 20 July 2021
G-YMMP - 23 July 2021
G-VIIH - 16 August 2021
G-YMMJ - 03 September 2021
G-YMMH - 05 October 2021
G-VIIJ - 29 October 2021
G-VIIA - 14 December 2021
G-YMMG - 07 January 2022
G-YMML - 31 January 2022
G-YMMK - 24 February 2022
G-STBH - 31 March 2022
G-YMMT - 24 May 2022
G-STBG - 14 June 2022
G-STBK - 21 August 2022
G-STBL - 09 October 2022
G-STBJ - 27 November 2022
G-YMMS - 22 February 2023
G-YMMR - 31 March 2023
G-YMMU - 04 May 2023
G-STBA - 24 June 2023
G-STBE - 22 September 2023
G-STBF - 12 December 2023

In Progress at CWL:

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Planned:

G-STBB - TBC (originally planned for March 2021)

G-STBC - TBC (originally planned for July 2021)
G-STBI - TBC
G-VIIV - TBC
G-VIIW - TBC
G-VIIY - TBC

*G-STBM/N/O/P were delivered new with cabins installed; date reflects entry into service rather than re-entry into service