"After directing Donald Sutherland and Kate Bush in 'Cloudbusting', Julian was asked to come up with ideas for 'Can I Play With Madness'. He managed to engage Graham Chapman to perform in the video." - What Does This Button Do?
Now, I would like you all to think about this. If Rod or the band have already contacted Graham in the past, why would they need Julian to contact him? Couldn't they ask him themselves? Also, if Bruce or someone from the band had already met with Graham, wouldn't Bruce comment on the fact in the book, especially in this part? I mean, he could easily comment something like, "Julian contacted Graham Chapman, who we (the band, Rod, Martin, me) had previously met during the recording of SIT"
The fact is that Graham Chapman didn't do the voice in Alexander.
P.D. I think I heard or read somewhere that no one in the band even met Chapman, because the day they were filming the video (Can I Play With Madness) they were all doing something else... Nobody remembers this?