Complex sentence: At the age of 10, Laviscount appeared in an advertising campaign for Marks & Spencer Laviscount secured roles in programmes such as "Clocking Off" and "Johnny and the Bomb" before becoming a series regular in BBC One series "Grange Hill".
Split into simpler sentences: At the age of 10, Laviscount appeared in an advertising campaign for Marks & Spencer. He secured roles in programmes such as "Clocking Off" and "Johnny and the Bomb" before becoming a series regular in BBC One series "Grange Hill".