Complex sentence: The company launched the Cheese & Onion crisp flavour in 1962, their first flavoured crisp, having been previously devised by Tayto (Ireland) in 1953.
Split into simpler sentences: The company launched the Cheese & Onion crisp flavour in 1962. This was their first flavoured crisp, the concept having been devised by Tayto (Ireland) in 1953.