Complex sentence: The squadron re-formed on 23 November 1940 at RAF Kirton in Lindsey and the squadron became operational as a night fighter unit, part of No.12 Group, on 5 January 1941, but due to snow no flying took place until 8 January 1941.
Split into simpler sentences: The squadron re-formed on 23 November 1940 at RAF Kirton in Lindsey. It became operational as a night fighter unit on 5 January 1941, assigned to No.12 Group, but due to snow no flying took place until 8 January 1941.