Kingsnorth power station is at Kingsnorth, which is not on the Isle of Grain.

Grain power station is at Grain, near Port Victoria, both of which are on the isle of Grain.

None of Upper Stoke, Middle Stoke, or Lower Stoke are on the Isle of Grain.

The AllHallows holiday camp is not on the Isle of Grain. It is the other side of the Yantlet, on what used to he AllHallows Marsh.

The Isle of Grain is the bit of the Hoo peninsula that used to be separated from the rest of the peninsula by Yantlet Creek/Yantlet Fleet.