In the sea of foreign signage I spot one familiar word. &lsquoDarjeeling&rsquo I brew up visions of tea bungalows, terraced plantations and the Darjeeling Himalayan Railway. But it&rsquos early morning at the Gare de Lyon train station in Paris &mdash and the backlit advert that&rsquos giving me ideas belongs to a high street lingerie and corsetry brand. Alas, the rakishly clad Parisian posterior on display belongs to no Himalayan hussy. No wonder our Tea Board is in a fume &mdash it&rsquos been fighting a legal battle to ensure that Darjeeling will forever be an Indian tea, and not a Parisian bloomer. But Paris and its perennial provocations must wait for another day. I have a train to catch. And it isn&rsquot the DHR, it&rsquos a TGV.