The Judicial Appointments Commission are increasingly using telephone assessments to short-list candidates. They are deploying them at different stages during competitions. They have prepared some very helpful advice to help candidates prepare and their full post is well worth reading.
I have also prepared some further guidance which I'm happy to share.
Prepare, make sure you have thoroughly read the documents and everything you need is to hand. You will not be able to ‘read the panel’ – don’t worry: both you and the panel lack the normal visual cues; but the panel will compensate with verbal cues. Concentrate on giving the best answers that you can. Don’t worry if you are not familiar with the area of law. The panel will be assessing your skills, not your existing knowledge. Take your time in answering and structure your responses. Ask for clarification if you don’t understand anything that the panel asks. Listen carefully to the questions, take on board all elements and take a note of anything that seems to have particular importance. Use your notes to answer questions, but try to avoid reading answers directly from your notes.