Granted that this is only an interim report - but it must surely be unsatisfactory that the details of Mr Ibbotson's FAA PPL and EASA PPL are still unclear and not on record somewhere. The AAIB report says they appear to have been in the aircraft and consequently lost.
The report makes also it clear that Mr Ibbotson SHOULD have been paying for half the cost of the flight AND that he was required to have "common purpose" to fly to Cardiff that night.