Investment banking boutique Tricorn Partners has been called in on its largest mergers and acquisitions deal to date, advising UK transport company FirstGroup on its $3.6bn (€2.8bn) takeover of Laidlaw International, the owner of Greyhound buses.

JP Morgan Cazenove advised FirstGroup alongside Tricorn on the $35.25 per share deal. Morgan Stanley is acting as sole financial adviser to Laidlaw, which came out of Chapter 11 bankruptcy in 2003.