Complex sentence: On 26 July 1940 the squadron was re-designated a specialised night fighter unit; it was among the first to receive Airborne Interception (AI), later referred to as radar.
Split into simpler sentences: On 26 July 1940 the Squadron was re-designated a specialised night fighter unit. The Squadron was amongst the first to receive Airborne Interception (AI), later referred to as radar.