Canal & River Trust

Paddington Arm (Grand Union Canal)

14 miles of navigable water, 1 lock, 8 named marinas and moorings. Passes Northolt, Southall, Wembley.

Will your boat fit?

BoatSizeFits?
Narrowboat57ft × 6ft 10inSome sections
Long narrowboat70ft × 6ft 10inSome sections
Widebeam60ft × 10ftSome sections
Widebeam60ft × 12ftSome sections
Dutch barge70ft × 14ft 6inToo big

Length and beam against Canal & River Trust. “Some sections” means your boat is too big for at least one section or lock. Draught and headroom aren't checked here: see the table below.

NortholtSouthallWembley

Published size limits

Maximum boat sizes in metres, from the Canal & River Trust's waterway dimensions (page last edited 26 Mar 2026). “–” means the Trust doesn't give a figure.

SectionLengthBeamDraughtHeadroom
Bulls Bridge to Little Venice (no locks)–4.31.32.67

Marinas and moorings

Each opens its Check a Mooring page: what's nearby on the water and ashore.

Services on the water

Mapped within 150 m of the Paddington Arm (Grand Union Canal) in OpenStreetMap. Volunteers map these, so there are gaps.

Water points 5

  • Black Horse Water Point
  • Bulls Bridge Water Point
  • Little Venice Water Point

2 more without a name in OpenStreetMap.

Elsan disposal 2

  • Alperton Elsan and Water Point
  • Little Venice Boater Facilities

Pump-out 0

None mapped.

Boat fuel 0

None mapped.

Rubbish disposal 3

  • Black Horse Rubbish Disposal
  • Little Venice Rubbish Disposal

1 more without a name in OpenStreetMap.

Winding holes 1

  • Black Horse Turning Point

Questions

Can a widebeam go on the Paddington Arm (Grand Union Canal)?

Partly. A 60ft × 10ft widebeam fits some sections of the Paddington Arm (Grand Union Canal) but not all of them. Check the limits for the sections you plan to use.

Will a 57ft narrowboat fit on the Paddington Arm (Grand Union Canal)?

Partly. A 57ft narrowboat fits some sections but not all.

How long is the Paddington Arm (Grand Union Canal), and how many locks does it have?

About 14 miles of navigable water on our map, with 1 lock mapped in OpenStreetMap.