neil tuckett 's newest model on his forecourt is 90 years old - but he is still selling one model t every week .
his cars are popular with the public as well as the tv and film industry , including the makers of downton abbey .
customers love the model t because they do n't require need road tax or an mot and are cheap to maintain .
he said : ` they 're like a giant meccano set really , and so beautifully simple and reliable they just wo n't let you down '