Mishcon de Reya is being sued for breach of contract and negligence by a former client who lost a £15 million court battle against retail mogul Mike Ashley.

Banker Jeffrey Blue is suing the firm, claiming he could go bankrupt as a result of the case’s high costs, according to legal documents filed at the High Court in London. Blue has claimed that Mishcon failed to “obtain adequate litigation finance or after-the-event insurance, as a result of which he suffered significant loss”.