John N wrote:
Problem solved. I feel a bit of a numpty, not realising this, but when the camera kept flashing up busy after I'd taken a shot I should have. As I said above, the selection dial had moved (inadvertently) from AUTO to CREATIVE FILTERS. This allowed HDR, but I was shooting as if on AUTO.
Pleased with the Forum Community for looking and thinking and confirming what I eventually suspected to be the issue.
Thanks all.