From the very useful "Hard Start/Non Start Condition –AJ26 Engines –Diagnostic Flowcharts", I think my part-load breather needs a clean. Trouble is I don't know what it looks like in order to find it. I know it is just under the engine cover of the left bank of the engine.

Can any kind and knowledgeable person point me at a picture of it, preferably in position, so that I can locate it?

 

Is this what you're talking about? - Partial Load Breather on Jaguar