I Had my licence revoked before I’d even got it. I was 18, passed out in shopping mall had ever test done possible and nothing showed up. I eventually saw a specialist and he found it was down to exhaustion. But Was told couldn’t apply for car licence for 12 months(providing no more blackouts) and when I applied for my hgv back in 2008 was told had to be free from any blackouts for 10 years to get hgv provisional. I had to wait a matter of weeks till my 10 years was up. They wouldn’t give it me early.