Yantlet

[2] In mediaeval times the Yantlet Creek (on the Thames) and Colemouth Creek (on the Medway) once formed a single watercourse, separating the Isle of Grain from the rest of the Hoo peninsula and providing a shipping channel from the Thames to the Medway under the conservancy of the City of London.

It was the preferred way for Medway boatmen to reach the London River, being shorter and less hazardous than passing by Queenborough.

Over sixty years the causeway was raised, built over the creek and the locals saw Colemouth and Yantlets as separate waterways.

[2] The City of London re-established the navigation in 1822, by digging a 0.5 miles (0.80 km) cut, and severing the causeway.

[2] The causeway at Grain Bridge was reestablished and the road reinstated by 1835, and the City of London effectively gave up claims to it.

The mouth of Yantlet Creek, protected by a sand-bar, could shelter 50 boats from a moderate storm.

It was used for firing long-range shells in a north-easterly direction across the estuary into shallow mudflats of the Maplin Sands.