Good question, They did not calculate a P:E but I will try and estimate a theoretical one based on EBITDA / IRR and NPV, etc
In the interim I just tripped over a really well put together summary of the BP
https://www.marketscreener.com/quote/stock/PENSANA-PLC-109347695/news/Pensana-nbsp-Announcement-of-Business-Plan-33021030/
PS: Somebody just told me that they think "Dumbpunter" who has been down-ramping PRE on LSE is a disgruntled PEK share holder !