That's not too bad, I was expecting to have to detour around Colwyn anyway as when I was there last month there was a lot of work to do with prom renovation with a detour already in place. Will the diversion start at the underpass by the station?Hi everyone. Just found out that apparently, it is Prom day on Saturday and Sunday so the prom will be closed to traffic from Old Colwyn to Rhos on Sea. That means we will have to make a small detour via Colwyn Bay centre and rejoin the cycle path at Rhos on Sea. Weather conditions look ok, cloudy, 15 degrees and 14mph winds SSW.