I am sure I have replied to this sort of question before, but I can't find it!
I made a speech - basically I said those of you who know me would be more surprised if I didn't make one! I read out a poem about my mum that Bianca had written (reducing some guests to tears), made a toast to mum, then started giving out gifts to my soloist and BMs - changing the whole tone of it with the presents being things like Snoopy and Harry Potter socks!
If you want to do one, then do it - it doesn't have to be elaborate
