Again forgive me but that doesn't necessarily make it obvious, your brain can tell you you're suffering from pain when actually there's nothing physically/diagnostically wrong in that particular area which is the only reason I mentioned it and indeed the query about the Neurologist.
If they believed the tumor to be cancerous then that would put him on a two week waitng list generally.... And going on my specific area but I think cancer waits are the same in general.... that usually means seeing a consultant, having scans and then some form of treatment plan which may or may not involve surgery within two weeks.
If it is not thought to be cancerous then it's not classed as urgent and this would involve scans, treatment plans, consultation etc... The 18 week rule brought in by the goverment generally dictates that this is the time frame you can expect but I don't know how well all Trusts are adhering to this. I know that if you need surgery in my area then theres 2-3 month waiting list for surgery for non-urgent cases.
From a clinical point of view, if Sqad is around he may be able to advise.
I think perhaps PALS (Patient Advice & Liaison Service) would be the best starting point for you and most hospitals have a branch of this within their organisation.