John has been involved in a wide range of international commercial, financial and City-related commercial disputes which have been resolved either through litigation, arbitration or other forms of alternative dispute resolution. In particular, he has acted for a number of clients where there have been concurrent and/or related proceedings in the US, and the UK, and has regularly acted for US clients with UK subsidiaries and/or other UK interests.

John has particular experience acting for (and against) investment banks, and for telecommunications companies in a wide range of disputes of a contractual nature, and involving fraud. His recent work includes acting on the Skype litigation which involved proceedings over the ownership of the underlying technology which underpinned the whole Skype platform (in both the UK and the US); acting for the City of Milan in the UK aspects of the derivatives litigation with JP Morgan, UBS and others; for RIT Capital plc in a long running £multi-million dispute, with proceedings in both the US and the UK; acting for one of the former directors of a plc in the conduct of numerous multi-party actions arising out of the demise of Claims Direct; and advising CIC Energy on a dispute concerning mining rights to significant coal deposits in Botswana. John has recently acted in a number of cases against leading UK and international banks in both contractual and mis-selling claims.

John is a committee member of the London Solicitors Litigation Association, and is also a member of the International Bar Association. 

His expertise is recognised in both the Legal 500 and Chambers Guide to the Legal Profession."John Bramhall is a 'tough and determined litigator'." (Chambers 2010) and has "the sort of knowledge that one only gets with years of accumulated experience on heavy or complex litigation."  (Legal 500 2009).