Complex sentence: The description and key words of'portable buildings' have caused contention amongst manufacturers and the major manufacturer Portakabin Ltd. Portakabin Ltd have protected their trade name and argue that the spelling "portacabin" is a misspelling.
Split into simpler sentences: The description and key words of'portable buildings' have caused contention amongst manufactures and the major manufacturer Portakabin. Portakabin have protected their trade name and argue that the spelling "portacabin" is a misspelling.