Thanks for that, really helpful. I'll go and study the examples!

I didn't think it would be that simple, and the header file does have a lot of functions, not all of which will be needed of course.

My real question is does my client really want to pay for my time to explore this, or do we ditch ePDQ and change payment provider!

Thanks for your comment anyway - if I manage to get it working I will, of course, post my results here!