I and my workmates were asked to give formal statements and speak to our HR bods about a claim for constructive dismissal by a colleague at a company I worked for a few years ago.
I took advice, and simply gave a statement outlining facts – dates, times and the rest. The interview part was not taped, and notes were not taken. Had my Union had the onions, I would have had a rep in the room with me, but they didn’t – I was on my own.
As above, if you are asked to speak in court, give factual evidence, not your opinion or hearsay. you say in an earlier thread that your ‘mate’ has submitted a transcript of a Facebook chat with him as evidence, which is a bit cheeky of him, and you will most likely be asked about that as well. I’d ask for a copy of the transcript before you talk about it – I’m assuming you were discussing rumour and hearsay and giving your own opinions, rather than discussing facts. The court will be interested in factual matters, not on how hard-done-by your mate and his co-workers feel.
Bear in mind you will have to look in the mirror every morning for the rest of your life, and act accordingly.