My experience was closer to star's than Towie's - we brought a photo of DS1, but the only action it saw was when one of the panel knocked it off the table with their bundle. I'm pretty sure I could have handed over a picture of Eric Pickles in a mankini without them being any the wiser.
We weren't asked many question by the panel - they directed most of their questions at the LA's witness. 'Questions' is probably stretching it - our panel didn't feel it worthwhile to examine, verify or otherwise substantiate any of the evidence this witness put forward. This isn't a typical panel approach, from what I can gather - most people I know who've been through tribunal have been pretty impressed with the rigour of their questioning.
So because the panel couldn't be arsed to test the evidence, we felt that we had to test it - and this was probably where we came unstuck. We didn't come across as the people who knew our son and his case best, and just wanted an adequate education for him - we came across as entitled, sharp-elbowed, grasping middle class parents who thought they knew better than the "real experts". We lacked humility when we put our questions across, and that was a big mistake - but at that stage, we had nowhere else to go. By mid-afternoon, the LA witness could have offered the panel a range of unique investment opportunities in Nigerian royalty and they'd have taken them.
This is a roundabout way of saying that there aren't any typical tribunal experiences, I think. It's something of a lottery, particularly when it comes to the panel members. I think that we got a hard deal, but at least we didn't get the judge who asked his panel how long the statement lasted before it had to be reviewed again. But most people I know who've gone through it feel that they got to say their piece and that the evidence of the other side had been thoroughly read and tested.
Only one more thing to add - bring your own lunch and loads of water! It saves you having to leave the building (a major ballache if you're in the main centre in London), and saves you having to queue up at the water cooler or local kebab shop with the LA...
best of luck! 