Noticed as i parked up then moved it to a better space 2 mins later that a fair size puddle of out had turned up

Looked underneath and sure enough oil was leaking out at about 4 drips a second! It had stopped buy the time i'd done what i was doing (BBQ with the folks) and isn't dripping now i'm home.
Without getting underneath it looked to be the flywheel end at the bell housing seal. BUt could have been running to the lowest point.
Whats the most likley seal or join to leak that end?
It's a 2l CU engine, the dipstick level is the same as when i checked this morning (must have know it was coming) but the engine is over filled (3mm over max on the flat)