Yes - a few are :
This is just a list of websites that Google listed, without warranty, comment or endorsement:
https://www.skedaddle.com/uk/
https://maximumadventure.com
https://www.peak-tours.com
https://www.bikeadventures.co.uk
https://www.pedalbritain.com
https://www.wildatlanticcycling.com
My own view, as is probably apparent form the Cycle-End to End Blog, is that planning is part of the fun of the ride!
