Loosing the logbooks is not such a big problem. I recently returned an aircraft to the register after the logbooks were lost, granted the engine & propeller were zero timed so that was easy. I had records to show the airframe hours & recertified the AD's.
The CAA require a statement from the owner to say the logbooks are lost (no need to give a reason).
The key is the detail kept by your maintenance organisation & the logbooks of the people who have flown it since the last check.