The Squadron reformed at Martlesham Heath in March 1924, but it was little more than in name, as their aircraft were part of the A&AEE trial fleet. This arrangement continued until 1934 when the squadron was reformed at Abingdon with Hawker Harts. It was shortly after this, that on the insistence of its Commanding Officer, Squadron Leader TW Elmhirst DFC, that the Squadron became known as XV Squadron.
from RAF web