U.K. Shakeout: Payroll and HR outsourcing company Northgate Information Solutions, based in Chester, England, is acquiring Link HR Systems for about $24 million. … Staffing company Carlisle Group of Belize is buying legal recruitment firm Chadwick Nott of London for about $3.9 million. Chadwick Nott provides attorneys and paralegals to law firms in Great Britain. … London-based recruitment software firm StepStone is acquiring talent- management vendor ExecuTrack for about $43 million in cash, loans and shares.