scottish_ppl, still no flight details on their website, but via other web agencies:
Monday - Saturday
BD661 EDI 11:25/SYY 12:20
BD662 SYY 12:50/EDI 13:45
Sunday:
EDI 14:40/SSY 15:35
SYY 16:05/EDI 17:00
Fares seem to start at £56 Northbound and £33 Southbound, £86 return.