woksam: From the FAQs on the Disclosure Scotland website:
2.4: How long does it take to get my BASIC Disclosure
A: If you have a clear criminal history then we will always get back to you within 7 days. If you have not received your certificate within 7 days then we are doing further investigation into past convictions we have found. These convictions are likely to impede in your ability to gain entry to any sort of flight training programme.
I got mine in around 14-21 days mate - nothing to worry about.