This design is the final version of the tower. There are some notable differences when compared to the 1825 version (SM 54/4/8). The first tier of the tower is the same height at 20' 6'', but now the second tier of the tower is 15' 6'' in height compared to 13' 6'', and from the base of the dome to the base of the pinnacle is 8' 9'' as opposed to 8' 0''. The width of the base of the tower is less (14' 1'' compared with 14' 6''), but this changes once the distance from the disengaged columns to the tower wall are added, and then the total is 22' 2''.

In terms of design, the most notable difference is that the columns on the first tier are free-standing, as opposed to engaged, an idea Soane introduced in his earlier 1822 designs. This necessitated a change in the architrave design, where each corner column is given its own mini architrave to support. This enlarged version became possible due to the raising of sufficient capital by public subscription in 1826, as all parties wanted to see the tower enlarged, although extra capital from the Commissioners was not forthcoming.

The drawing also presents us with a notification of the contractor Daniel Sharp, who won the tender for the Church in August 1825. The contract states the cost of £19,524, but the specific work incurred an additional cost of £648, making the total £20,172.