Airbubba
You can believe what you like about Oslo however I repeat.
Captain McAuliffe's blood test was negative. Not rumour not urban legend. Fact.
This is still an ongoing open case as other crew members have to answer to other authorities so any more detail of why Willie resigned would be inappropriate and may prejudice any case.
Both pilots have had and still have the support of BALPA to help them deal with whatever the future holds and they couldn't have a better rep from BA and Principal Negiator looking after them.