Floating dry docks are no longer available off the shelf

Could Britain buy floating dry docks on the used market?

Not realistically; the old surplus has aged out and current demand means suitable docks must be newly built.

Suitable second-hand floating docks are described as unavailable. Large wartime production left a surplus that served many countries for decades, but those docks have aged out or become unusable. New construction did not continue regularly enough to replace them. Several nations now need to order new docks at the same time.