A Church local to me & a Weatherspoons pub have these, so the frequencies are worth keeping an ear on.
This lience allows for mobile & base operation at a maximum ERP of 2 watts & with a maximum antenna height of 15 meters. Base stations are not permitted to directly communicate with other bases.
No mention is made of handheld radios, so presumably the watt limit also applies to all mobile radios.
Several frequencies within the 26mhz CB spectrum are licensed & no transmission of music is permitted.
Frequencies & bandwidth taken from the above sample licence.
Click on the images below to enlarge them, as they were too big to show in full as an image.
The above gives band width & other relevant information.