Complex sentence: Bow Creek is a long tidal estuary of the River Lee and is part of the Bow Back Rivers, below Bow Locks forming the boundary between the London Boroughs of Newham and Tower Hamlets, in East London.
Split into simpler sentences: Bow Creek is a long tidal estuary of the River Lee and is part of the Bow Back Rivers. Below Bow Locks the creek forms the boundary between the London Boroughs of Newham and Tower Hamlets, in East London.