Nellie - I'm not up to date with Best Evidence guidance but under the previous memo of good practice, we were told 1 - 3 interviews with young children were possible. Practice however developed that only one interview was conducted, another attempt to avoid being accused of leading child witnesses or interviewing children who'd been influenced by their carers between interviews. It's unusual for a 5 year old to give evidence in court - more likely to be children around age 7 upwards. As you said, we don't know what Henry did say during his interview. I suspect the police will be insisting he isn't offered any play therapy or direct work for fear of contaminating his evidence. It's infuriating isn't it. I'm not having a go at the Police, I understand the process but still feel it doesn't give children the best opportunity to talk.
I'm with others here - let's hope the detective's natural suspicion and desire to find out what really happened at BHC was sharpened by Rob's dramatic performance. Also the fact he lied and embellished can't have helped his case