Based on your experience, I'd love to chat with you offline. My law firm (together with another firm in London) is building software for deal lawyers. If you're interested in meeting, you can reach me via the email address on my firm's page: http://yusonirvine.com/
If nothing else, I'd like to introduce you to my UK counterparts.
Interesting - I would be interested in chatting with you too. I am a lawyer at a Big law firm. One of the things that I have been doing (which clients love) is writing software to automate or enhance parts of what I do.
I made an arrangement immediately when I started. I told them I do code on the side, and that I had other people that I worked with on that code.
They agreed that they pay me for legal work, not for code. Thus, the tools I build are mine, but the analysis and output of those tools may be theirs if I am using the tools for their benefit.
If nothing else, I'd like to introduce you to my UK counterparts.