Biggles,
While I do sympathise with your situation (and fwiw, agree mainly with the caveat emptor advice given by others), I'd simply like to caution you not to build up any big hopes that an MOR (whether raised by CAA or anyone else) will do anything at all to help (although it won't do any harm either)
There is a common misconception that an MOR will trigger a full investigation into an event and guns willl be brought to bear on the 'culprit', when in reality all that happens in 99% of cases is that they appear in the monthly digest (now only online for one month, then disappear into obscurity) with a 'closed on receipt' comment.
The likelyhood is that the report is simply added to the ever-growing database of events, and whoever is involved may have to answer a few gentle questions from CAA the next time they meet - the clue is in the title 'Mandatory Occurrence Report', not Investigation
If you feel strongly enough to pursue this, you'll need bigger guns than the 'threat' of an MOR, sorry...