The delay in doing this (the announcement of the roll out was supposed to be last month and the Better Broadband for Suffolk website has not been updated since August) may of course simply be because no-one wants to have to be the public face of the satellite announcement.
It definitely has the opposite appeal to having to announce a USO of 10Mbps. I notice DC grabbed the "glory" of that one.
Personally, I always felt it was going to be tied into the announcements of the budget plans for what to do with the last 5%. Yes, that is more oriented at superfast speeds, but it is talking to the same audience.
I note that the house of commons has published a new variant of their briefing paper:
It mentions the new USO proposals, and also mentions trials of the BDUK satellite options in Suffolk and West Yorkshire. For Suffolk, it refers to this:
which, I think, matches your report that things should have been announced last month.