Complex sentence: In 1964 Loganair mounted an inter-island scheduled network in Orkney and a similar network in Shetland commenced in 1970, and the strong association with these island communities continues today.
Split into simpler sentences: In 1964 Loganair commenced an inter-island scheduled network in Orkney, and a similar network in Shetland began in 1970. The airline's strong association with these island communities continues today.