I am a founding partner of Reckon. I try to advise or inform my clients about issues in economic regulation and competition law.
My CV (3 pages, PDF) has an overview of my experience.
Please contact me if you think that I might be able to help you. I am happy to discuss your needs or your situation without any charge or obligation.
If you are interested in access charging and charging structures for regulated networks, you might enjoy "This tariff compromise seemed like a good idea at the time" (10 pages, PDF), a short story, and the accompanying spreadsheet (4 tabs, Microsoft Excel).
http://dcmf.co.uk/ has some other things that I am doing.