Again thank you both for your invaluable comments.
Firstly I was not aware that the Ven will only function as an SSRI at this level - although I have a feeling my psychiatrist will increase it when I see him later this week.
I've googled the CBT folks and they are BABCP accredited and they do have a large team of therapists so I assume they are fairly established. And at the end of the day I like the like the therapist I see.
I can understand his frustration as I do tend to feel absolutely naff one way or another every time I see him. Either caused by anxiety or by side effects. Having GAD I do tend to focus on the negative.
My fist 3 months of CBT was very positive - it got me back to work, in to shops and on public transport. I then had relapse after relapse ever since and I'm back at rock bottom as we speak, hence stating the Ven.
I agree that the combination of CBT and medication is the way forward for me. I'll certainly ask the questions mentioned above and I think I will suggest going back to CBT basics. The only harm it will do is to my bank balance.
T