Does M29 flood?

Yes — parts of the M29 district carry real flood risk: 6 of its 34 at-risk postcodes reach the Environment Agency's High likelihood band. The M29 postcode district covers Astley, Boothstown & Ellenbrook, close to Tyldesley, Atherton, Leigh, and surrounding villages in parts of Greater Manchester and Warrington.

34 postcodes in the M29 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 6 high, 7 medium, 21 low. A postcode not listed here has no properties in any recorded risk band (which is good news, but never proof it cannot flood).

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Which M29 postcodes are at risk?

M29 8FP up to High M29 8FQ up to High M29 8JH up to High M29 8JN up to High M29 8LB up to High M29 8PR up to High M29 7BR up to Medium M29 7DG up to Medium M29 7GL up to Medium M29 7HR up to Medium M29 7HT up to Medium M29 7JZ up to Medium M29 8GG up to Medium M29 7BG up to Low M29 7BP up to Low M29 7DQ up to Low M29 7EA up to Low M29 7ED up to Low M29 7ET up to Low M29 7EX up to Low M29 7FN up to Low M29 7HS up to Low M29 7JD up to Low M29 7LL up to Low M29 7LN up to Low M29 7LW up to Low M29 7ND up to Low M29 7PH up to Low M29 7SS up to Low M29 7ST up to Low M29 7SU up to Low M29 7TX up to Low M29 7UA up to Low M29 8WN up to Low

Rivers and flooding history near M29

The rivers that matter here, each monitored live on FloodRadar:

Size Bridge, Tyldesley on the Ellenor Brook — 0.2 km away, highest on record 1.47m
Atherton Shakerley Road on the Shakerley Brook — 2 km away, highest on record 1.73m
Lilford Park, Leigh on the Atherton Lake Brook — 3.3 km away, highest on record 4.51m
Howe Bridge on the Atherton Lake Brook — 3.8 km away, highest on record 1.18m

90 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (52 at warning level or above), most recently 20 September 2025. Warnings cover flood areas, not individual addresses.

Recorded flood extents near the district (Environment Agency record):

Wigan Leigh - NYE/NYD 25 (2024) — about 3 km from the centre

Records, not floods: no outline on the record is not evidence a place has not flooded.

🏠 Buying or renting in M29? The full property flood-risk report covers any postcode here — the official likelihood band, every recorded flood nearby with distances, warning history year by year, how the local rivers behave, and an insurance outlook, print-ready for £19. See what's in the report →

Flood risk in nearby postcode districts

M28 M30 M27 M31 M26 M32 M25 M33

Band = the worst likelihood band of any property in that postcode (EA Risk of Flooding from Rivers & Sea, defence-adjusted, area-level). Check any postcode in detail — or get the full £19 property report — at the property flood-risk report. © Environment Agency copyright and/or database right 2025. All rights reserved. Some features of this map are based on digital spatial data from the Centre for Ecology & Hydrology, © NERC (CEH). © Crown Copyright and Database Rights 2025 OS AC0000807064. This product is produced in part from PAF® and Multiple Residence Data, the copyright in which is owned by Royal Mail Group Limited and/or Royal Mail Group plc. All rights reserved. Licence number AC0000807064.