In 1962, "Mountwood" and "Woodchurch" were joined by a new ferry, the "Overchurch". Built at the Birkenhead shipyard of Cammell Laird and Co., "Overchurch" was of all welded construction and also had a bridge that was completely enclosed rather than a wheelhouse and navigation boxes like "Mountwood" and "Woodchurch". The addition of a totally enclosed bridge meant that there only needed to be one binnacle upon it, whereas on the two sisters there were three, one inside the main wheelhouse and two in the docking/navigation boxes. The "Overchurch" also had much of its instrumentation fitted into specially built units, meaning the ferry had a spacious bridge, rather than the more compact and cluttered bridges of the "Mountwood" and "Woodchurch". "Overchurch" had a high funnel immediately behind the bridge and also a small bridge deck, giving the appearance of a somewhat forward top-heavy look, as a result. The "Overchurch" was fitted with the same navigation equipment as her near sisters. She differed slightly by being a few tonnes heavier and a few inches longer. The "Overchurch" also had only one access stairway to the promenade deck unlike the Dartmouth twins which had two.