Complex sentence: Working with the company's managing director, Alan O'Hea, the five secretaries began to think up a slogan; after rejecting "I'm Behind Britain" for having the wrong message, they settled on "I'm Backing Britain".
Split into simpler sentences: Working with the company's managing director, Alan O'Hea, the five secretaries began to think up a slogan. After rejecting "I'm Behind Britain" for having the wrong message, they settled on "I'm Backing Britain".