William Long - Sidley Austin
William Long
Areas of practice:
  • Information & Data Protection Law
  • IT, Technology & Telecoms
Sidley Austin

William Long’s CPDcasts

William is an official CPDcast contributor and contributes to the following podcasts:



William Long advises international clients on a wide variety of data protection, privacy, information security, social media, e-commerce and other regulatory matters. William is a member of the European advisory board of the International Association of Privacy Professionals (IAPP) and has experience with EU and international data protection and e-commerce projects working for clients in financial services and life sciences, as well as other sectors.

William was previously in-house counsel to one of the world’s largest international financial services groups as their e-commerce counsel establishing Interactive Investor which is one of the world’s largest online consumer financial services businesses with over 8 million users. He has been a member of a number of working groups in London and Europe looking at the EU regulation of e-commerce and data protection and spent a year at the UK’s Financial Law Panel (established by the Bank of England), as assistant to the Chief Executive working on regulatory issues with online financial services.

William is recognized in Chambers UK 2014 for Data Protection, with sources telling the publication he "is clearly a subject matter expert" and that "he is able to give quick advice and was timely and responsive. He is very personable, pleasant to work with and down to earth." He is also recognized in the LMG Life Sciences for intellectual property. Most recently, William is listed in the 2015 edition of Best Lawyers in the UK in Privacy & Data Protection.

William Long - Website Details:



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