The church began life then in the early 19th century when London, visible across the fields, was overflowing to the Surrey suburbs. The chapel has been elevated several steps above the street level. The builders in the early 19th century must have known of the proximity of the River Effra, now channelled underground for most of its length.
The architect was Raymond Wilshire, a pupil of Charles Barry, who designed the Houses of Parliament. When first built, Trinity was known as the 'chapel among the trees'. Fan assisted trench heaters have been installed all aligning to the church nave and covered by natural wood top end grille to compose discretely to the chapel architecture.
The minister said, he is extremely happy with the heating system now, as previously, when using the traditional cast iron radiators, he ought to turn on the heating a one day before the mass, recently it is fair enough to turn the boiler and heaters just 2 hrs before the mass and the energy efficient, powerful, yet quiet fans will do the job of distributing the warm air across the chapel.