In an obituary of Trevelyan, by an anonymous old friend of Trevelyan, and published in the parish magazine of 1929, there is a very detailed description of Trevelyan’s ministry.
In the early days of Mr Trevelyan’s incumbency, it was clear that one of his first objects should be to try and get on friendly terms with all the parishioners , and Mr Trevelyan himself spared no pains in the endeavour to make himself personally known to all members of the flock. …. A man once remarked, “When people come to see me they don’t say ‘How are you?’ but ‘How is W.B.T.?" 
Mission to men of the parish
Trevelyan visited the ‘Common lodging houses’ where he gave addresses to the lodgers and also organised social events for them. He also organised ‘smoking concerts’ for the men.
The parish was divided up into sections and some 200-300 men would be invited. ‘Mr Trevelyan was an adept at wandering about the room and making personal acquaintance of his guests’. 
Trevelyan continued his work for men through special services when he gave ‘beautiful addresses’ . These services were later replaced by a Sunday afternoon Bible Cass in the Mission Hall. 
Activities for the women
A variety of clubs were organised specifically for women and so contact could be made with the thieves and girls on the street. Activities included Mothers’ meetings, institutes and Evening Clubs. Parochial nurses were also introduced,
Together with the Revd Jervois, Trevelyan drew up a three year Sunday School course and the Christian handybook of prayer.
During Lent and Advent, post-Evensong instruction was given when nearly the whole congregation remained behind. He also encouraged Confirmation.