Oh thank you so much for thinking of me, you are all lovely. 
Am so sorry I didn't reply. I've only just seen this thread. Its been a hell of a week here, with ds1 having a major meltdown, complete with self-harming and suicide threats, my appointment, lots of school stuff for me to attend for both boys, cupcakes to bake and decorate for their Christmas parties and having to redo ds1's parental advice, as the lovely LEA have changed the form - including the slant of the questions and some new ones thrown in for good measure - since I started typing it back in the Spring and I did't find out until they sent their response to my initial request for SA
.
Not been to bed much before 2.00 am all week and feel positive sick with exhaustion. Thank goodness its finally the holidays.
Anyway, back to your question ..
The mri showed more lesions, of a similar type to last time - but as the idiotic NHS have burned the films from my previous mri they couldn't do a side by side comparison.
They do have the written records though and felt it warranted further investigation.
The consultant has spoken with two specialists in mri analysis from different hospitals and basically they are considering MS at the moment, but if it is, I'm not a typical case. Apparently I have a lot of the symptoms and my history - plus the neuro/cognitive problems I have developed, are all suggesive of it, but not in the typical pattern, although it can present is vastly different ways for different people. 
I have to go for a lumbar puncture in January, plus some other tests I have forgotten the name of that trace the speed of nerve messages from your feet, hands and eyes to the brain.
The appointment was a whopping 50 minutes long, she took some more of my medical history regarding what have always been thought of as ME crisis episodes and went from 'I would like you to have these tests, but you don't have to decide today' at the start of the appointment, to 'I am going to book you in for the tests today' by the end.
So, we are not really any closer to a dx. Even the results of the tests can't give a definitive yes or no to MS, but if certain markers are absent from both my cerebral fluid and blood, then it means its highly unlikely.
I did ask what would be their next move if that happened and she said that my symptoms and brain lesions are concerning and obviously have a cause, but we would have eliminated the most worrying possibilities and she may decide at that point to assume its CFS/ME related and not take it any further - unless of course the tests throw up more questions that require further investigation.
Not really had time to process it all, so am not sure how I feel about it all yet.
I do know that I am not at all happy that the lumbar puncture is done on an in-patient basis and you have to be ready to go in straight away on the day they call you. She did make a note of the fact that I have a three children, including a toddler and a child with ASD, so can't just drop evertything at a moment's notice and said I will probably get 24 hours notice maximum, as a result. 
Gut feeling at this point, is that its not MS and the probable outcome is going to be a formal ME dx. I did consider refusing the tests, but then decided that I've had these problems the whole of my adult life (first crisis was when I was 19), they've seriously affected my quality of life, jeopardised every job I've ever had and left me pretty much unemployable. So, its probably about time I looked for some answers. Quite apart from anything else, if does turn out to be something that has the potential to be hereditary - we need to know for the dcs.