Nearly right about the way Portsmouth launches ships, there's no ship lift but the ships are rolled out onto a barge which is then sunk in one of the base's dry docks allowing the ship to float off.
1. HMS Albion/Bulwark
2. RFA Fort Victoria
3. A "Small Ships" set including a Hunt Class, a Sandown Class and a River Class (with optional flight deck and mast for HMS Clyde), throw in a couple of P2000's for good measure.