"Harry, did you just cast an Evasiono spell instead of an Avoidancem spell?"
Fieldfisher is being sued by one of the UK's most successful literary agents for providing allegedly duff tax advice.
Neil Blair, who oversees JK Rowling's Harry Potter empire, claims that Fieldfisher "wrongly assured" him about the tax status of his investment in the film production of The Book Thief, a 2013 movie starring Geoffrey Rush which made £76 million on its £19 million budget.
The agent and his company, The Blair Partnership, were invited to participate in one of several partnerships which were created by Ingenious, which was already a Fieldfisher client, to exploit tax breaks by investing in movies which included Hot Fuzz and Life of Pi.
After HMRC decided that the partnerships constituted unlawful tax avoidance vehicles, hundreds of investors received tax demands, including a pair of Spice Girls, Ant & Dec, several professional footballers, Jeremy Paxman, and Blair. Over 500 participants in the wheeze have sued Ingenious and various advisors for £200 million.
Blair, who is claiming more than £2 million from Fieldfisher, alleges that the firm should have advised him there was a significant risk that investors would be unable to set off all their losses against other taxable income, given HMRC's increasingly tough treatment of similar attempts to make use of film investment vehicles.
Fieldfisher declined to comment.