Numberplate ending in **05BSG (did make me think of Battlestar Galactica, lol)
So after a count, that makes it 3 unknowns I've spotted so far and with rtbiscuit and SilentKK8, that makes it at least 6 Zeds in Ipswich.
If we include sally that makes it 7.
Silver being the majority and GM coming in second.