The main authority on the subject of dishonest assistance is the
case of Royal Brunei Airlines v Tan [1995] 2 AC
378 according to which a person who dishonestly
procures or assists in a breach of trust or fiduciary obligation is
liable in equity to make good for the resulting loss.
Recently, the English Court of Appeal in the case of
Group Seven Limited & Ors v Notable Services LLP
& Ors [2019] EWCA Civ 614 set out the current law
in relation to dishonest assistance as being the following:
''[...]in order to find a person liable for
dishonest assistance of a breach of trust, it is necessary to
establish that:
(a) there was a trust in existence at the material
time;
(b) the trustee committed a breach of that
trust;