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:
The 2014 NICE Clinical Guidelines refers to the diagnosis process and good practice guidelines.
It can be found here: http://www.nice.org.uk/guidance/cg186/evidence/cg186-multiple-sclerosis-…
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.