Audi a3 bls knocking

Dreaded bls engine knocking and sometimes a slight misfire.
Fault codes are camshaft sensor
Cylinder 2 misfire

Cam in good order but shells worn through to copper 5 buckets have been changed previously leaving 3 looking old it seems like oil starvation.

The motor starts on the button with no smoke metallic knock get more noticeable when revved then the cam started to seize.

I no these suffer from conrod failure but haven't got around to remove sump to check today and bearing but like said cam shells are worn and started to seize with 3 old buckets but would this cause the heavy metallic knock please help

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