Looks like you got some free head coolant passage swarf from Triumph too bro.
Got it in both my heads,,,
Dude i don't think any oil goes through head gasket anywhere near your leak.
That being on the intake side, there's a chance it's not from the head gasket but the cam cover gasket.
If it don't seal good on the spark plug towers then oil can get out and dribble down the moisture escape channels to very very close to where your leak appears to start.
Edit: added pic -