If you would like us to do your law essay for you, it might help if you actually looked up the definitions of marriage in the cited cases and posted the different definitions for people to comment on. Also look up where these cases have been cited in later cases. You might also want to refer to certain judicial comment in cases like Re Watson [1999] 1 FLR 878 on the very different types of "marriage".
Under the circumstances happyjo and given that those subjects are arguably the most boring in the world, I'd say it was a perfectly reasonable request. I don't see there being many takers though, people would rather watch paint dry and wait for it to crack. So squarebear could be in.