Complex sentence: On 13 March 1997, Principal Hayley Group purchased the Selsdon Park Hotel and have since have undertaken a £2.5 million refurbishment, including a new reception area, additional conference and banqueting facilities and a business centre.
Split into simpler sentences: On 13 March 1997, Principal Hayley Group purchased the Selsdon Park Hotel. Since acquiring this property Principal Hayley have undertaken a £2.5 million refurbishment of the Hotel, including a new reception area, additional conference and banqueting facilities and a business centre.