Complex sentence: These departments, which employed over 25% of the total staff, included Property management, valuation, rating, building surveying and research and by the time of its Centenary in 1996 the UK staff totalled about 700.
Split into simpler sentences: These departments, which employed over 25% of the total staff, included property management, valuation, rating, building surveying and research. By the time of its centenary in 1996, the UK staff totalled about 700.