Approximately after 6 months of seeing a psychotherapist you'll start seeing a doctor and should be prescribed after one or two appointments with them. It does vary on waiting lists and the processes of the specific GIC. Look up the NHS England gender protocol 2014.
Youll be given a choice of either injections or gel, pills are bad for the liver, less effective and not used in the UK. I posted some more stuff on your other similar thread, but apparently you've deleted it or I've got the wrong person.