Multiple frequencies with UK CB FM traffic noted at ~1428z. 27.78125 is the standout in my waterfall at the moment. Airspy HF+D and 31' vertical.
27.73125 MHz - UK FM CB Radio Channel 14
27.79125 MHz - UK FM CB Radio Channel 20
27.84125 MHz - UK FM CB Radio Channel 25
27.85125 MHz - UK FM CB Radio Channel 26 - often with QRM from 27.845 MHz and 27.855 MHz
27.89125 MHz - UK FM CB Radio Channel 30
27.90125 MHz - UK FM CB Radio Channel 31
27.91125 MHz - UK FM CB Radio Channel 32
27.97125 MHz - UK FM CB Radio Channel 38
27.98125 MHz - UK FM CB Radio Channel 39
27.99125 MHz - UK FM CB Radio Channel 40
Seem to be the other busy ones (in my experience anyway). Unfortunately the lower channels (especially channels 1-10, so 27.60125 MHz - 27.69125 MHz) are often getting clobbered by SSB QRM.