William Wastie is the Head of the Professional Practices Group and one of the UK’s recognised leading experts in the field of LLP and partnership law, advising national and international professional service firms from all disciplines. He was involved in the LLP movement from the outset and has also led on some of the major developments arising out of the Legal Services Act 2007.

He specialises in international mergers and de-mergers, partnership downsizing, governance, profit sharing, management issues and firms’ internal partnership arrangements and strategic issues, as well as the management of distressed partnerships and assisting in the use of partnerships and LLPs in corporate structures. William also has a leading contentious practice, advising on the most difficult, confidential and sensitive partnership disputes.

William is a former Chairman of the Association of Partnership Practitioners and is on The Times Law 100 Panel of leading practitioners. He previously practised at the Bar. He is described in Chambers UK 2017 as excelling in both contentious and non-contentious partnership law matters, his strengths including “decisiveness, clarity, responsiveness, patience and expedition”.


"An enormous amount of gravitas with  more diplomatic skills than virtually anyone else I've come across"
Chambers UK (2016)

"One of the most outstanding partnership practitioners in the market"
Chambers UK (2012)

Professional memberships
  • The Association of Partnership Practitioners
  • Inns of Court School of Law
  • Bristol University - LLB (Hons)
  • Eastbourne College
  • Partner at Addleshaw Goddard (2006)
  • Mayer Brown LLP (formerly Rowe & Maw) (2001 to 2005)
  • Tenant at Hollis Whiteman Chambers (1994 to 2001)
  • Called to the Bar: 1993