I’m also signed up for the longer ride, would like to hope I can manage 15 mph but don’t know. Has anyone worked out the actual route?
I appreciate from the post above that we start from the Salterns and do the long loop, what I’m not clear about is how we get from tenby onto the second loop and where precisely to plot my route into my garmin.
I like to have it count down the miles as I ride! 
Currently I think we are doing the full loop then riding to lamphey, into Pembroke, round the one way, straight out again the way we came in back to Lamphey then up the ridgeway and onto Narberth etc picking up the long route.
Anyone know? Help?