We have upgraded our SITS system to the version 8.7.0 over the last weekend. This was a double upgrade from version 8.6.0 to 8.6.1 and then from 8.6.1 to 8.7.0.
The upgrade process went well. It started from 1pm on Friday 28th Feb, and completed by Saturday evening. This allowed the technical technical tests to start from Sunday morning, and by the 4pm Sunday afternoon, the system was ready and re-opened to the public.