Complex sentence: Following the establishment of the Pembrokeshire Coast National Park in 1952, Welsh naturalist and author Ronald Lockley surveyed a route around the coast, and his report for the Countryside Commission in 1953 was welcomed and broadly adopted.
Split into simpler sentences: Following the establishment of the Pembrokeshire Coast National Park in 1952, Welsh naturalist and author Ronald Lockley surveyed a route around the coast. Lockley's report for the Countryside Commission in 1953 was welcomed and broadly adopted.