I've had EMDR for PTSD and it definitely helped where nothing had before. To answer your questions.
how was the treatment for you?
At the time it feels pretty traumatic, because you have to think about the things that traumatise you in order to address them. However the point is to make a change during the session, so I would be asked to think about something and score my distress out of 10. We would then do the EMDR and I would then be asked to score again. For me it was always lower. My therapist would also make sure there was plenty of time at the end of the session to make sure I was ok and not leaving in distress. I always left feeling calmer and safer.
- what were the improvements?
I definitely found an instant improvement using EMDR, I was able to deal with thinking about things that I would previously block out because they were too traumatic without freaking out. EMDR had an immediate effect, but I used it in combination with CBT, exercise, anti-depressants and an all round wonderful therapist. Because of the multi- pronged approach that helped me I can't say what effect EMDR on its would have had, however being able to to think about trauma allowed me to get the benefit from talking therapy which I couldn't have otherwise done.
- Is there a suitability criteria who can benefit - depending on severity?
I can't give you a definite answer on this as I'm a patient not a practitioner. All I can tell you is where I was. I was unable to work due to extreme anxiety, could only cope with close family without having my DH to support me, couldn't drive without panicking and was generally terrified of the entire world.
I still have bad days and some things are scary, but I do freelance work again, travel all over the world and daily thank my amazing therapist.
- can you recommend a therapist?
My therapist is Midlands based, but I would happily give you her details as I'm sure she could help you find someone in London.
My problems started later in life than your DP, but his symptoms sound so familiar. I can vividly remember how awful it was to feel like that and how awful it was for my DH to live with that stress. Please pm me if there is anything else I can do to help.