Slaughter and May has lined up alongside a raft of Danish firms on a €500m (£390m) deal that saw Lego billionaire Kirk Kristiansen team up with a pension fund to secure a stake in Danish facilities giant ISS.

Slaughters took a role advising ISS and majority shareholders GS Capital Partners and EQT Partners as Canadian pension fund Ontario Teachers’ Pension Plan (OTPP) and Kirkbi Invest – a holding company that invests on behalf of the family behind Lego – took a 26% stake in the company.