If you know Holy Trinity well you may have noticed the corbels finishing off some of the arches but you may not know that they are the faces of Queen Victoria and Prince Albert - an architectural flourish by Edward Blore who designed the church.
There are most likely twelve in all (we can't view the west arch to be sure - the organ was later moved there and the pipes cover much of it): eight are placed on the sides of the galleries looking into the church - they are placed alternately so that a Victoria is always facing an Albert; there is one either side of the east arch (by the steps to the altar) facing into the church; and one Victoria is placed about midway down the north gallery facing the congregation seated there and an Albert is similarly placed in the south gallery.