Just wanted to update so far.    After not being able to stomach plenvu and literally wrenching after every mouthful  I was prescribed moviprep.  I was dreading it.  I was pleasantly surprised how much better the taste was.  Like a lemsip sort of taste.  I managed to get the two doses down me within the two hours.  There is a lot of liquid but I split it up into 2 x 500ml bottles and did one at a time.  Just wanted to assure anyone who had a similar experience with plenvu that In my opinion moviprep more tolerable despite the larger quantity.  Also I would recommend pm appointments as the doses are split over one evening and one morning rather than an am  appointment which is 2 doses in one evening.   Just sat now relaxing before I set off later for my 4 o'clock appointment for the colonoscopy itself.