RSGB Band Plan (effective from 1st January 2009)
The following band plan is largely based on that agreed at IARU Region 1 General Conferences with some local differences on
on frequencies above 430 MHz.
18 MHz (17m) Necessary UK Usage
18,068-18,095 kHz 200 Hz Telegraphy 18,086 kHz QRP (low power) Centre of Activity. 
18,095-18,105 500 Hz Narrow band modes
18,105-18,109 500 Hz Narrow band modes - automatically controlled data stations (unattended)  
18,109-18,111   IBP - reserved exclusively for beacons
18,111-18,120 2.7 kHz All modes - automatically controlled data stations (unattended)
18,120-18,168 2.7 kHz All modes, 18,130kHz SSB QRP centre of activity
    18,150kHz digital voice centre of activity
    18,160 kHz  Global Emergency Centre of Activity
LICENCE NOTES: Amateur and Amateur Satellite Service - Primary User. 
The band is not to be used for contests or bulletins.
Notes to the Band Plan
ITU-R Recommendation SM.328 (extract)
Necessary bandwidth: For a given class of emission, the width of the frequency band which is just sufficient to 
ensure the transmission of information at the rate and with the quality required under specified conditions.
The use of Amplitude Modulation (AM) is acceptable in the all modes segments but users are asked to consider
adjacent channel activity when selecting operating frequencies. 
Foundation and Intermediate Licence holders are advised to check their licences for the permitted power limits and 
conditions applicable to their class of licence.