Pics.
We set up a trip where we hiked from town to town, staying in B&B's everynight, luggage was shuttled for us, and many an ale was quaffed at the local pubs. We covered about 60 miles of the coast path (which is 186 miles in length). Started near Milford Haven and ended in St. Davids 6 days later (5 days hiking, 1 day side trip described below).

Nothing strenuous, but not a cakewalk either when the weather got mean. My Marmot Precip jacket was sufficient to keep me dry even when the wind/rain was blasting us on Skomer. Wrapped my backpack in a rain cover which kept it dry as well. Used ziplock baggies for essential stuff for backup, just in case the rain cover failed.

We also took a "rest day" to go for a hike on Skomer Island, just a short boat trip from the town of Marloes. Skomer is well known for the gazillion birds that call it home (Puffins, Manx Shearwaters, etc.).

This is just one of many many hikes/trails/paths/routes that exist in the U.K. They make it easy to go for long/short hard/easy walks in beautiful country.
Links...
http://www.nationaltrail.co.uk/pembrokeshire-coast-path
https://en.wikipedia.org/wiki/Skomer
p.s.
Also learned about coasteering - a new form of insanity that I am sure about 75% of you crazy people would enjoy. Google it and check this link...
https://www.celticquestcoasteering.com/