Complex sentence: The fleet received a brand new livery, replacing the old SeaCo livery, whilst all fleet members received complete internal refits which reflected the company's new colours and the rebranding of the company's on board lounges.
Split into simpler sentences: The fleet received a brand new livery, replacing the old SeaCo livery. All fleet members received complete internal refits which reflected the company's new colours and the rebranding of the company's on board lounges.