<sod >Jim Mullen, chief executive, cautioned against over-optimism, however: âHistory would strongly dictate that such a run of results in our favour would see customer staking suffer, but encouragingly these numbers firmly buck that trend and combine strong staking and a good margin.< eod>< sod > Jim Mullen, Ladbrokes' chief executive, cautioned against over-optimism, however: âHistory would strongly dictate that such a run of results in our favour would see customer staking suffer, but encouragingly these numbers firmly buck that trend and combine strong staking and a good margin.< eod>