[linknet]

You've now given me the idea that I might be able to re-map the ff and rew buttons to NextChannelGroup and PreviousChannelGroup, which isn't ideal exactly but would give me a useable scenario without too much issue. 

Brilliant idea, works fine:

Code:

  <TVGuide>
    <keyboard>
      <g mod="ctrl">Back</g>
      <e>PreviousMenu</e>
      <t>ShowTimerRule</t>
      <epg>PreviousMenu</epg>
      <g>NextChannelGroup</g>
      <z>PreviousChannelGroup</z>
      <f mod="ctrl,shift">NextChannelGroup</f>
      <b mod="ctrl,shift">PreviousChannelGroup</b>
      <backspace mod="longpress">Number0</backspace> <!-- 0 key goes to "now" on EPG timeline -->
      <browser_back mod="longpress">Number0</browser_back> <!-- 0 key goes to "now" on EPG timeline -->
      <period mod="longpress">ChannelNumberSeparator</period>
    </keyboard>
  </TVGuide>

The latest Plus Skin update for the build you are using is in first the post