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Bus route 20

Transport
20
Usually an Alexander Dennis Adl Enviro 400H.

77% on timeof departures in the week ending 17 October 2026, leaving no more than 2.5 minutes early or 5 minutes late. Half of London's timetabled routes managed 73% or better.

The last week, day by day
Share of departures leaving on time.

Watch a day of route 20’s buses: every bus, replayed on the map. Or click a day on the chart.

The weekly figures

The share of departures that left on time.

Week endingWalthamstow Bus StationThe Broadway
21 Jun 2025no datano data
28 Jun 202549%81%
5 Jul 202561% thin85% thin
12 Jul 202589% thin91% thin
19 Jul 202557%81%
26 Jul 202573%56%
2 Aug 202576%61%
9 Aug 2025no data72%
16 Aug 2025no data77%
23 Aug 2025no data77%
30 Aug 2025no data80%
6 Sept 2025no data76%
13 Sept 2025no data77%
20 Sept 2025no data82%
27 Sept 202557%80%
4 Oct 202553%82%
11 Oct 202543%69%
18 Oct 202563%64%
25 Oct 202573%79%
1 Nov 202582%88%
8 Nov 202576%82%
15 Nov 202577% thin77% thin
22 Nov 202563% thin85% thin
29 Nov 202545%73%
6 Dec 202548%68%
13 Dec 202557%66%
20 Dec 202556%83%
27 Dec 202580% thin92% thin
3 Jan 202686%96%
10 Jan 202668%64%
17 Jan 202648%68%
24 Jan 202646%72%
31 Jan 202652%66%
7 Feb 202667%76%
14 Feb 202653%84%
21 Feb 2026no datano data
28 Feb 2026no datano data
7 Mar 202669%79%
14 Mar 202649%78%
21 Mar 202657%83%
28 Mar 202653%91%
4 Apr 202643%77%
11 Apr 202646%87%
18 Apr 202633%83%
25 Apr 202672% thin60% thin
2 May 202670%71%
9 May 202676%82%
16 May 202668%74%
23 May 202664%74%
30 May 202652%80%
6 Jun 202649%88%
13 Jun 202651%73%
20 Jun 202647%68%
27 Jun 202658%73%
4 Jul 2026no datano data
11 Jul 202651%78%
18 Jul 202658%70%
25 Jul 202664%69%
1 Aug 2026no datano data
8 Aug 2026no datano data
15 Aug 2026no datano data
22 Aug 2026no datano data
29 Aug 2026no datano data
5 Sept 202669%78%
12 Sept 202658%66%
19 Sept 202657%66%
26 Sept 202664%16%
3 Oct 202679%64%
10 Oct 202676%75%
17 Oct 202673%81%

A passenger going by the timetable at Walthamstow Bus Station would find about three departures in ten leaving more than 2.5 minutes early or 5 minutes late.

Walthamstow Bus Station
On time
73%
Cut short
3.5%
The Broadway
On time
81%
Cut short
1.7%

62 minutes was the longest gap between buses this week, at Lea Bridge Road / Bakers Arms towards Burton Road, on Saturday 17 October from 20:57 to 21:59. This excludes any gaps caused by holes in our own data. Watch it happen →

Journeys cut short

Last week: 4.0% of journeys were turned back before the end of the line in the week ending 17 October 2026. Everyone on board has to get off; for anyone waiting further along the route it's effectively a cancellation.

towards Walthamstow Bus Station

Last week, 22 of 422 journeys (5%) were turned short.

  • Leyton Green Road1.8 km short of the end 8
  • Lea Bridge Road / Bakers Arms1.3 km short of the end 5
  • Chingford Lane6.1 km short of the end 4
  • Woodford Green / Broadmead Road6.4 km short of the end 2
  • Monkhams Lane6.8 km short of the end 1
  • Elsewhere along the route 2

towards Burton Road

Last week, 11 of 412 journeys (3%) were turned short.

  • Loughton Station5.9 km short of the end 8
  • Oakhurst Gardens13.6 km short of the end 1
  • Woodford Green / Broadmead Road10.8 km short of the end 1
  • St Thomas of Canterbury Church10.0 km short of the end 1

Each place is the last stop the bus was timed at before it turned round, with the typical distance it fell short of the end of the line. The five busiest are named; the rest are counted together.

Compared with TfL's own figures

QuarterTfLOurs
2025/26 Q313 Sept – 2 Jan 202677% on timeno figure
2026/27 Q11 Apr – 26 Jun 202680% on timeno figure

TfL's figures come from its own tracking equipment and its own timetable; mine are computed from the buses' public position feed. They are the same calculation on independent data, so they should broadly agree and move together rather than match exactly.

About this data
Data collected, week ending 17 October 2026
100% of the week. This is the share of the week for which we hold bus location data at all, across the whole of London rather than for this route. A week under 60% is not published; under 90% it is marked as thin.
Departures observed
  • Walthamstow Bus Station: 257 departures seen
  • The Broadway: 256 departures seen
A guide to how much evidence sits behind this week's figures, not a measure of the service.
How it is measured
Every day, 05:00–23:59. On time means leaving no more than 2.5 minutes early or 5 minutes late. A day with less than four hours of data collected shows no daily figure. How these figures are made.
Gaps in the record for this period (39)

Most recent first. Hover a week on the chart and it will name the gap behind it. Most are a few missing hours on an otherwise ordinary day.

  • 17 Sept 2026 partial day, no data 12:00-12:59: our collector was down (machine off or power cut)
  • 28 Aug 2026 partial day, no data 20:00-23:59: our collector was down (machine off or power cut)
  • 29 Jul – 26 Aug 2026 no collection: the volunteer BODS archive was down and our own collector had not yet started
  • 28 Jul 2026 partial day, no data 11:00-23:59: no collection: the volunteer BODS archive was down and our own collector had not yet started
  • 7 Jul 2026 partial day, no data 15:00-15:59: gap in the volunteer BODS archive (its collector was down)
  • 5 Jul 2026 partial day, no data 06:00-11:59: gap in the volunteer BODS archive (its collector was down)
  • 4 Jul 2026 partial day, no data 06:00-21:59: gap in the volunteer BODS archive (its collector was down)
  • 2 Jul – 3 Jul 2026 gap in the volunteer BODS archive (its collector was down)
  • 8 Jun 2026 partial day, no data 07:00-08:59: gap in the volunteer BODS archive (its collector was down)
  • 7 Jun 2026 partial day, no data 12:00-12:59, 18:00-19:59: gap in the volunteer BODS archive (its collector was down)
  • 6 Jun 2026 partial day, no data 12:00-12:59, 16:00-16:59, 18:00-18:59: gap in the volunteer BODS archive (its collector was down)
  • 27 Apr 2026 partial day, no data 12:00-12:59: gap in the volunteer BODS archive (its collector was down)
  • 21 Apr 2026 partial day, no data 06:00-11:59: gap in the volunteer BODS archive (its collector was down)
  • 20 Apr 2026 partial day, no data 15:00-23:59: gap in the volunteer BODS archive (its collector was down)
  • 16 Apr 2026 partial day, no data 12:00-15:59: gap in the volunteer BODS archive (its collector was down)
  • 28 Feb 2026 partial day, no data 06:00-18:59: gap in the volunteer BODS archive (its collector was down)
  • 16 Feb – 27 Feb 2026 gap in the volunteer BODS archive (its collector was down)
  • 15 Feb 2026 partial day, no data 16:00-23:59: gap in the volunteer BODS archive (its collector was down)
  • 30 Jan 2026 partial day, no data 20:00-23:59: gap in the volunteer BODS archive (its collector was down)
  • 25 Dec 2025 no bus service on Christmas Day
  • 23 Dec 2025 partial day, no data 06:00-07:59: gap in the volunteer BODS archive (its collector was down)
  • 5 Dec 2025 partial day, no data 06:00-08:59: gap in the volunteer BODS archive (its collector was down)
  • 24 Nov 2025 partial day, no data 17:00-17:59: gap in the volunteer BODS archive (its collector was down)
  • 17 Nov 2025 partial day, no data 06:00-09:59: gap in the volunteer BODS archive (its collector was down)
  • 15 Nov – 16 Nov 2025 no London vehicles in the national feed — TfL's export to BODS was down (the volunteer archive itself was collecting)
  • 14 Nov 2025 partial day, no data 06:00-07:59, 13:00-23:59: gap in the volunteer BODS archive (its collector was down)
  • 31 Oct 2025 partial day, no data 06:00-07:59: gap in the volunteer BODS archive (its collector was down)
  • 17 Oct 2025 partial day, no data 06:00-07:59: gap in the volunteer BODS archive (its collector was down)
  • 10 Oct 2025 partial day, no data 06:00-08:59: gap in the volunteer BODS archive (its collector was down)
  • 3 Oct 2025 partial day, no data 06:00-11:59: gap in the volunteer BODS archive (its collector was down)
  • 19 Sept 2025 partial day, no data 06:00-08:59: gap in the volunteer BODS archive (its collector was down)
  • 5 Sept 2025 partial day, no data 06:00-09:59: gap in the volunteer BODS archive (its collector was down)
  • 1 Aug 2025 partial day, no data 06:00-09:59: gap in the volunteer BODS archive (its collector was down)
  • 18 Jul 2025 partial day, no data 06:00-09:59: gap in the volunteer BODS archive (its collector was down)
  • 8 Jul 2025 partial day, no data 06:00-08:59: gap in the volunteer BODS archive (its collector was down)
  • 6 Jul – 7 Jul 2025 gap in the volunteer BODS archive (its collector was down)
  • 5 Jul 2025 partial day, no data 18:00-23:59: gap in the volunteer BODS archive (its collector was down)
  • 4 Jul 2025 partial day, no data 06:00-14:59: gap in the volunteer BODS archive (its collector was down)
  • 25 Jun 2025 partial day, no data 06:00-11:59: gap in the volunteer BODS archive (its collector was down)

For latest timetable and route information, see TfL's official page.

Contains public sector information licensed under the Open Government Licence v3.0; bus data via the DfT Bus Open Data Service and Transport for London. Figures are computed from observed bus positions, every day, 05:00–23:59. How these figures are made. Bus positions from the Department for Transport’s Bus Open Data Service (BODS); the Department for Transport cannot warrant the accuracy or quality of the data published there. Positions before September 2026 come from the Bus Open Data archive generously built and kept by Open Innovations, with thanks. Route lines and stops: Powered by TfL Open Data. Contains OS data © Crown copyright and database rights 2016. Geomni UK Map data © and database rights [2019]. These pages and the bus replay are built independently from open data: Transport for London, the Department for Transport and the bus operators had no part in making them, and none of them endorses them. Not for planning a journey.