Caroline now on several new SSDAB multiplexes as well as Luton, many first noticed this morning on Digital Spy, others now listed on the Wohnort site:

Harlow and Bishops Stortford
Hastings
North East London which has good coverage outside it's licenced area
Brighton
East Hampshire
Kent Coast
West Kent
Ashford
SE London/NW Kent

Poster on the SSDAB thread says Caroline now on all five Kent multiplexes so presume that means Canterbury as well,

Most/all of these are testing at the moment, official launch will be soon.