I had some success through another route.
I used my laptop computer as DVD player and got an optical output via an external sound card (Audigy 2NX). So you were right that it was a BluRay player problem rather than a minidisc problem.
Other observations: don't use Sychro record as a DVD doesn't have tracks the same as a CD. It didn't put any track splits in, other than one in the middle of the first song (that now has a 2 second gap there). After the whole disc was finished I went through and manually inserted track splits.
Regards,
David