Manches is set to pursue insurance magnate John Charman through the Bermudian Courts to recover the £48m he owes his ex-wife as part of their divorce settlement.
John Charman was ordered to pay his wife Beverly Charman £48m by the Court of Appeal in May 2007, the largest divorce payment in legal history.
The Lawyer has learnt that John Charman failed to hand over the full payment to his ex-wife and so she has instructed her lawyer, Manches partner Helen Ward, to enforce the order.
The case is expected to be heard in March.
John Charman's Bermuda-based lawyer, Marshall Diel & Myers partner Georgia Marshall, is believed to be contesting the UK court's right to extend the influence of UK court orders to offshore trusts.
The news comes just weeks ahead of the Crossley divorce case, which will test whether prenuptial agreements should be binding if one spouse fails to disclose their assets when the prenuptial is first agreed.
Both cases will have major implications for high-value international divorce cases.
If Stuart Crossley is successful in resisting his ex-wife's claims to his offshore assets, it could undermine the Charman ruling.
Stuart Crossley is represented by John Charman's UK lawyer, Withers partner Mark Harper. Susan Crossley is represented by divorce specialist Raymond Tooth of Sears Tooth.
Both Charmans' UK spokespeople and Manches declined to comment.