Thanks @Nigel - no worries, you’re bang on, the question seems very obvious now to me! Alas, it was a bit of a nightmare podcast to record (no slight on the interviewer whatsoever I have to say) - had my signal dropping a few times during the call, missed the questions a couple of times, stumbled a bit over a couple of explanations and overall not my finest performance! 
Ah well, practice makes perfect 
Thanks for the feedback, really useful 
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