Thanks for the replies folks!
Its an interesting subject and is great to hear the reasoning!
Nepotism, I can understand angines engled inwards would increase stability, but the whole reason I noticed this subtle design feature is how the inboard and outboard engines DON'T appear to be aligned - which would be confirmed by Notso Fantastic.
So, my next question is, are engines (slightly) toe-ed inwards on twin engined jets? and are the outboard engined toe-ed in also on all other 4 engine jets?
Thanks again folks