The church website says:
The Chapel itself was built after the war. The Foundation Stone was laid by Bishop R.O Hall on 10th December 1949 and the Chapel was consecrated on 4th March 1950. During the consecration, Bishop Hall dedicated the Chapel to those who died in the war and those who suffered here during the internment. We remember them on Remembrance Sunday in November every year.
As well as being the School Chapel, since 1977 it has also been home to the present English speaking congregation as a daughter church of St. John’s Cathedral
They also have a history booklet available for download from: