Mick, there isn't much but see these other two threads
 Lyr Req: Whiskey on a Sunday
thread.cfm?threadid=91115#2421484 
&
Who is/was Glyn Hughes
thread.cfm?threadid=33415#2608823 

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'glyn hughes' in the "Lyrics & Knowledge Search" box up in the top right corner will get you loads of hits but those seem to be the main threads mentioning him