Hi Wouter,
This version is on the Snowy White 'Goldtop' album
I started a thread asking much the same.
http://ledge.fleetwoodmac.net/showthread.php?t=38559
Here is an edited précis of that thread .. listen to the voice right at the start of the track... :-
I have two versions of Slabo Day.
The first is from PG’s 'In The Skies' and is credited with Snowy White playing the lead and PG playing rhythm
The second, which I guess was recorded at the same time is on a Snowy White album ‘Goldtop’.
Right at the beginning of this version, a voice can be heard saying ‘I’ll take it this time’. I am 99% sure that the voice is Peter Green, also the playing seems to have much more depth…
I know the voice that says 'I’ll take it this time’ (with an East London accent) on the 'Goldtop' Slabo Day track is definately Peter. Why would he say that, and not take the lead? (Snowy came from Devon... and grew up on the Isle of Wight, totally different accent)
With the quality of playing on that track, I am convinced that this is Peter on lead.
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There is another thread earlier than mine that Sharksfan2000 pointed to:-
Norton, this question has come up before - check out this thread:
http://ledge.fleetwoodmac.net/showthread.php?t=35327
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I still believe that Peter played lead on the 'Goldtop' version
Regards Norton (best bikes ever)