Approach
There are a small number of bolted routes located at least two areas near the Church of St John the Theologian. One of the cliffs lower down seems to now be impossible to climb due to a building/structure built at the cliff base.
The other cliff, higher up, is still accessible.
Walk along the streets or lower board walk to approach the Church. From the entrance gate to the area, continue walking in the opposite direction for a few meters to see the cliff.
This is the rough location:
https://maps.app.goo.gl/wvMYExoWCxZJqeX19
As a visitor to the area, I do not know how well climbing is tolerated at this location.