Complex sentence: He first worked as a technical illustrator for Hawker Siddeley and also illustrated album sleeves, not least for guitarist Anthony Phillips and over 200 designs in the popular "Harbottle Hamster" range of greetings cards for Gordon Fraser.
Split into simpler sentences: He first worked as a technical illustrator for Hawker Siddeley. He has also illustrated album sleeves, not least for guitarist Anthony Phillips, and over 200 designs in the popular "Harbottle Hamster" range of greetings cards for Gordon Fraser.