MonissaDown to the other end of the country, on #Tresco one of the Isles of #Scilly are two forts: Cromwell's Castle (left), a 17th century fort built at the end of the Civil War to replace King Charles' Castle (right & on the hill).
Of the latter, the English Heritage website says: ""Its guns would have to point down at so steep an angle to hit ships in New Grimsby Channel that the cannonballs would have rolled out of the cannons before they fired" and "It was garrisoned by the Royalists during the Civil War, but when the Parliamentarians took Tresco in 1651 they simply bypassed the castle by landing on the other side of the island." Generally, as forts go, something of a failure.
