Hi Dave many thanks for the comment, I think you've hit it on the. The internal Dictaphone microphone is reasonably sensitive but the external clip-on one supplied which I used is even more so. It's clear that the audio was badly clipping when looking at the recording in Audacity. I think I'll be investing one of those excellent microphones recommended by Jon Kulp.

Many thanks for the useful advice and really looking forward to hearing your episode and yes I'll hope to have another go if I get a chance.

Best regards

MrX