Almighty God, who didst call thy deacon Laurence to serve thee with deeds of love, and didst give him the crown of martyrdom: Grant, we beseech thee, that we, following his example, may fulfil thy commandments by defending and supporting the poor, and by loving thee with all our hearts, through Jesus Christ our Lord, who liveth and reigneth with thee and the Holy Spirit, one God, for ever and ever.
Dan Martin’s blog has an “alternate” collect for the day.