The Guild was formed in 1969, on the initiative of the then Master, Professor Rich, its purpose being to encourage members of the College and of the Society, wherever they may be and whatever denomination they may support, to make their communion on the Sunday next before 25 November (St Catharine's Day) in each year with the College in mind; and to inform the Master that they have done so. In 2007 the Governing Body has agreed that the original purpose of the Guild be redefined to read as follows: to encourage members of the College, wherever they may be, to remember the College according to the tradition and spirituality of their faith, on or around 25 November (St Catharine's Day) and to inform the Master's Secretary that they have done so.