All,The below link is another reference where if you scroll down...

All,

The below link is another reference where if you scroll down to 'Launch Sites' section you can see a mention of SAS.

So at present we know where the Pearls will take off from (Mojave). Looks to me like SAS is planned to go up on the VO 5th flight.

It is an interesting read regardless in case you have not checked this page out. 

SAS revised their 'Early 2019' to '2019' as VO still needs to do a few tests - this can also be read in the 'History' section of the same link below.

I see all this as positives as there is more time for testing and reducing risk. This will still need some time to accomplish but the next 12 months will be going from baby steps to a nice slow walk - good things will happen.

https://en.wikipedia.org/wiki/LauncherOne

DYOR & GLTA