Thank you for your replies, there is an "electrical shed" (shed describes the condition aswell) which none of the breakers tripped and the cables go directly through the shed "floor" to the "bollards" I'll speak to one guy who may know a little more about the system.
Unfortunately the owners...
So where I've got my boat, the supply box to my boat has lost power, when the consumer unit was tested (each supply box has it's own consumer unit) if read approximately 2v ac on the input when this wire was removed its reads approximately 130v ac (not a stable reading) I assume its damaged...