Since uninstalling Malwarebytes, rebooting my PC, running mbam-clean-2.3.0.1001.exe (available from the support area of the Malwarebytes website), rebooting my PC and then reinstalling the .05 version I did not have this problem reoccur. I left it for a few days without issue and then updated to the .06 version a few days ago and have still not had a reoccurrence of this issue.
This method of curing this issue was published in one of the many threads on this topic (sorry I can't remember who suggested it!) and my thanks to them for sharing it.
Well, I obviously spoke too soon!
After carrying out the process above the .05 version ran for 3-4 days without issue, I then saw the recommendation and updated to the .06 version and again this ran for 3-4 days without issue then yesterday I started getting the same issue, Real Time Protection - Web protection has stated turning itself off again. Glad I hadn't got round to sorting this issue on my laptop as that would have been a waste of my time!
Malwarebytes, many of us are paying customers and this is not what we expect. I accept that problems occur, but I do expect that they will be repaired and sorted out in a reasonable amount of time, which this hasn't.