There appear to be many different paging protocols in use. Some of these systems seem to be POCSAG and others just sound like POCSAG.
There is a lot of 26 MHz band activity too. I use 26.695 MHz / 26.745 MHz (plus center frequency 26.750 MHz) as well as 26.600 MHz, 26.645 MHz / 26.655 MHz and center frequency 26.650 MHz and the 26.850 MHz, 26.900 MHz, 26.945 MHz, 26.950 MHz, 26.955 MHz, 26.960 MHz, 27.300 MHz, 27.350 MHz, 27.360 MHz and 27.505 MHz ones as band opening indicators.
Plus there's the 27.450 MHz system (or systems) that transmit a continuous carrier when idle, and the 29.800 MHz, 29.900 MHz systems. The 29.8 MHz and 29.9 MHz systems are believed to be located in the Nordic countries.
I don't know where 27.9400 MHz is coming from though.
Update:
At 1344 UTC I tuned in to 27940 kHz FM 27.94 MHz FM and the signal is there. I'm listening via SDRs located in the UK.
There are at least two different transmitters with a carrier or pilot tone frequency:
Weaker of the two is on 27940.07 kHz, stronger of the two is on 27940.2 kHz. There's POCSAG underneath this unique data burst mode, plus voice QRM from 27.940 MHz LSB and UK FM CB activity 27.94125 MHz FM.