Here's what happened with me. It was quite an anticlimax.
Sols. exchanged form E's before hand. I arrived at court and sat in one of the consulting rooms with my Sol. My X did the same. The sols. had a short session between themselves. We were called into the DJ about 15 mins later than the appointed time. Both Sols. presented the facts. I wanted a 50/50 split of assets and my x to have a share of my pension. My X wanted to keep all of the house and leave my pension alone. So we disagreed on any form of settlement. The DJ stated no agreement would be possible and signed the FDR case off to go to FH. So we spent 15 mins only with the DJ and I had no contact with my X ( nor wanted to). It was all very civilised, no arguing, ( I never said a word), so dont worry.
It will be you and your sol. in the chambers with your X and his sol. No one else. Your x's partner can sit in the public waiting room if she wants.