Hi NLN,
not sure how long your technical interview will be remotely as we were questioned throughout the day, however we did have a short interview at the end of the day to recap but this was only about 10 minutes.
From memory they questioned me on maintainable and non maintainable emergency lighting, star delta motors, to be honest it was basic stuff nothing to stress about.
as I’ve said if you are a qualified electrician with relevant experience across the industry you have nothing to worry about, they are not looking to catch you out and just looking for competency.
Have you completed the practical assessment and multiple choice exam?
Regards
baz