Complex sentence: On retirement, the Tedds sold the company to Thamesdown Transport of Swindon, but in 1997, Kingston was sold on to Wilts & Dorset and the fleet of eight coaches was moved to Wilts & Dorset's Salisbury bus depot.
Split into simpler sentences: On retirement, the Tedds sold the company to Thamesdown Transport of Swindon, but in 1997, Kingston was sold on to Wilts & Dorset. The fleet of eight coaches was moved to Wilts & Dorset's Salisbury bus depot.