Complex sentence: The "unfinished" barrage was the cause of much embarrassment to the Welsh Assembly.The CHA have made significant progess in the creation of bay edge walkway and have redeveloped a large portion of the previously unaccesible bay periphery.
Split into simpler sentences: The "unfinished" barrage was the cause of much embarrassment to the Welsh Assembly. The Cardiff Harbour Authority have made significant progess in the creation of bay edge walkway and have redeveloped a large portion of the previously unaccesible bay periphery.