Complex sentence: Web sources link Jolly to Shadow, a precursor organisation to the now defunct 15 (UK) Psychological Operations Group; in 2015,15 (UK) Psyops Group being subsumed into the British Army's new 77 Brigade.
Split into simpler sentences: Web sources link Jolly to Shadow, a precursor organisation to the now defunct 15 (UK) Psychological Operations Group. In 2015,15 (UK) Psyops Group was subsumed into the British Army's new 77 Brigade.