Csec support people - anyone taken two?

I know the norm is to have one support person with you in the csec, but this is my last baby and after two previous csec I was hoping they may let me mum come in this time with my husband, has anyone had success in taking two people in? I'm with an obstetrician who will perform the csec, I hear of people taking in photographers so can't see why it would be any different to taking my mum. Hoping someone out there has a positive story for me:-)