It did go well, thanks. T2 has proven pretty rock solid and supportive with everything so far. I spent the first half of the session fighting back tears. I asked him if I will ever look at T1 as simply 'a therapist I had once' because it doesn't feel possible. I told him that my heart and my head are at war. My heart is like a child stamping her feet, slamming doors and shouting "I hate you!" and my head is the parent calmly watching and saying "I'm only doing this for your own good!" Head and heart are not on speaking terms right now.
When I got home I had a missed call from T1 so I called him back and we scheduled for 9 days time. It was much easier to talk to him this time. I think because I had just been processing all the pain and sadness.