Thanks for that
@Markdvdman . The points and new signalling must be in operation now.
I cycled down the Taff Trail last week when there were no trains. The new bridge, as well as serving the station also replaces a foot crossing giving access to the Taff Trail, which was about 30 metres north of the original platforms.
The bridge is now signposted as New Access to Taff Trail on the Edwardsville side. I asked the workmen if I could take my bike over the bridge and they said yes the bridge is ok but I have to take the bike down the steps as the ramp was faulty. So it may be the gradient of the ramp is the problem.
There have to be flat sections at regular intervals, double handrails, maximum gradients etc. which the ramp may have fallen foul of.