Graphic above from NICE CG113
When you are diagnosed with GAD, your GP may recommend trying self-help treatments before having more intensive psychological therapy or medication.
This will usually involve working from a book or computer programme for around six weeks or longer. In some cases, you may be closely supported by a trained therapist who you will speak to every week or two, although some treatments only involve minimal or occasional contact with a therapist who will monitor your progress.
Phone and email counselling are alternatives to face-to-face therapy. They can be ideal if you’re shy or don’t want to meet the therapist or if you can’t find one in your area. They save travelling time, can avoid the problem of having to find childcare if you have children and are available at evenings and weekends. You can also have three-way conversations for couples therapy.
Phone counselling is just like having a face-to-face session except that you talk to a trained counsellor over the phone
Quotes from http://www.nhs.uk