OK.....here's a very easy one to get the ball rolling.

Originally Posted by tobyGnome

Is the answer that they all played at the Isle of Wight festival in 1970? Fantastic line-up but unfortunately I was only 3 at the time. Were you actually there Keithie?

I was but I don't remember Procul Harum being there. That's not to say that they weren't but I don't remember them.

No, the answer I'm looking for is more to do with songs.