For those going through the diagnosis process these documents may help -
MS is diagnosed based on the 2010 McDonald criteria. It can be found here:
http://www.nationalmssociety.org/NationalMSSociety/media/MSNationalFiles…
The 2014 NICE Clinical Guidelines refers to the diagnosis process and good practice guidelines.
It can be found here: Multiple sclerosis in adults: management | Guidance | NICE…
I will add, if you have been waiting for results / appointments for considerable time, chase them. If you are dissatisfied with those responsible for your care, change them.