Today not many Compton organs can be found in the south of London.  However, a superb example can be found at Wallington United Reformed Church in the borough of Sutton.

The organ was built sometime during the 1950s and is the "Series 4" model.  What makes this organ different is that it uses a "Harmonic Flute" as opposed to the more standard "Hohl Flute".  The other ranks are: Open Diapason, Salicional and Trumpet.  Originally the console was situated in front of the chamber but at some point during the early 1980s it was moved to its present location on the opposite side of the chancel.

The specification remains original and reads:

Acoustic Bass 32'
Sub Bass 16'
Echo Bass 16'
Flute 8'
Salicional 8'
Trombone 16'
Trumpet 8'
Great to Pedal
Swell to Pedal

Bourdon 16'
Open Diapason 8'
Harmonic Flute 8'
Salicional 8'
Octave 4'
Harmonic Flute 4'
Salicet 4'
Twelfth 2.2/3'
Super Octave 2'
Swell to Great

Contra Salicional 16'
Harmonic Flute 8'
Salicional 8'
Harmonic Flute 4'
Nazard 2.2/3'
Piccolo 2'
Cymbale III
Trombone 16'
Trumpet 8'
Clarion 4'
Tremulant (affecting whole organ)

4 double touch thumb pistons to Great and Pedal
4 double touch thumb pistons to Swell and Pedal
4 toe pistons to Pedal and Great
4 toe pistons to Pedal and Swell
1 canceller thumb piston - Great to Pedal
1 canceller thumb piston - Swell to Pedal
1 balanced expression pedal - organ
1 balanced expression pedal - Crescendo
Double touch canceller to each department
4 ventil switches