Some usefull mapping resources.
JNCC
Resources for UK marine conservation and other marine zones.
Shows chart reporting areas, coastlines and MCZs.
WMS URL: https://mpa-ows.jncc.gov.uk/mpa_mapper/wms
C-Map Chart explorer
Allows previewing C-Maps wonderful high resolution bathymetry ocean maps in a browser (Raster only in the preview).
The android app (Free, with subscription options) has their full vector maps.
Very nice for finding new diving spots around the coastline
URL: https://www.c-map.com/chartexplorer/
Garmin Chart preview
Similar to the previous item allows previewing Garmin and Navioncs’ high resolution bathymetry charts in a browser, while their apps get access to the full vector map data.
URL: https://maps.garmin.com/en-GB/marine/?maps=another-brand&overlay=false