The site of an abandoned car dealership is on the market months after it shut. The Barretts Citroen and DS branch in Westminster Road, Canterbury, closed in September last year as bosses cut ties with the French car-makers after 20 years – a decision Barretts was “not happy about”. Being marketed by Knight Frank’s commercial team, the lot is now up for grabs – though the estate agent will only offer a price upon application. It benefits from two high-quality buildings, providing showroom and workshop accommodation on a large site of about 1.1 acres. The larger of the two units recently occupie…