Interesting morning!!
By 9.30 this was how things looked
Then investigation began,
I remember reading on a certain someone's off white XE track car build thread on here about using talc to show where a leak was coming from, so to save me taking the sump off I thought I'd employ the talc method to see if I could find the leak, so I removed the flywheel, talc up the block and put the flywheel back on.
Ran the engine up for 5 mins, then took the flywheel off to find
Clearly the talc around the seal is wet but the 5th main cap sides look dry as does the sump gasket, this was a result.
Down to ECP to collect a rear crank seal, cleaned, vaselined, installed, tested again
Double result, all back together by 1pm, quick road test and check again and all seems dry. Will need more of an extensive test to be sure but I can't be bothered right now.
Must remember to find out whoever gave me the idea of the talc and thank him!!