Sussex Fire & EMS is available on 154.2425,as well as the 700 system. Sheriff is encrypted on the 700Mhz system. I'm not aware of any encryption in Southampton, a check of the RR database should confirm that.
Southampton SO as well as Fire/EMS is in the clear. There are several Tac channels that are simplex. Unless you’re close enough when those are used, you won’t be able to hear them.
All TDMA 1023 is enc on the unit side disp in the clear, 1031 full time enc, 1047 not sure in same radio number ranger as Sussex units , no hits on the other tg's while I was there this weekend