As I've not driven a five speeder, I'm staying out of the "should Morgan fit the mod for free" argument, but the letter does clearly explain to me why Morgan don't like Mr Revett's modification - so for that, thanks, I like to understand things!
I too would suggest the document is replaced with another with the personal details removed. In the UK, only elected representatives (MPs, councillors etc) have the expectation others may publish anything they say, for anyone else, one should always ask permission.