I have almost filled my yellow book with vaccinations. You get it when you contact NHS and make an appointment with your closest travel clinic. I went to my usual surgery Sterndale in Hammersmith.
The nurse recommended to get Hepatitis A and B, Typhoid, Rabies and the compulsory Yellow Fever. Some of them require more than one shot so make sure to start your treatment at least 3 weeks before you leave.
I am also going to get an anti malaria treatment but for that I need another appointment.
The injection are almost harmless so don't be scared. Be scared of the bill though as some of those vaccines are not free and cost up to 40£ per short.
And yes, you can also use private clinics as Nomad (STA Travel) but it will cost you more.