Using sausages imported from an award-winning German butchers, this much-loved food truck operates at the station end of Lewisham High Street. Each served in a freshly-baked hot dog roll, a wide number of sausages are available, including a classic smoked Frankfurter and various riffs on the classic Bratwurst. A selection of halal beef sausages is also served alongside some vegan alternatives made with seitan. All condiments and toppings are also free, including the likes of remoulade, German mustard, curry sauce, onions and pickled gherkins. A south east London institution.

While New York is often considered the spiritual home of the hot dog, Chicago is home to some of America’s finest examples — the world’s meatpacking capital during the fast food icon’s 19th century conception. Popularised by Illinois’ Jewish community, traditional Chicago hot dogs feature beef sausages with all natural casings. A tribute to the world-famous dogs served at Hot Doug’s, a now closed institution, Chicago-born Goose Island Beer Company’s Shoreditch Brewpub serves a version with an all beef kosher sausage, crowned with sweet onion, sport pepper, pickles, relish, mustard, fresh tomato and celery salt. Never ketchup.

Hot dogs are particularly popular throughout Scandinavia. With a variety of national differences, street food vans typically champion some of the respective countries’ most sustaining and affordable options (especially attractive to British tourists encumbered by the exchange rate). Scandinavian Kitchen’s Fitzrovia cafe features a Scandinavian hot dog of note on its lunch menu, comprising a pork wiener-style sausage topped with Nordic mustard, ketchup, pickles, crispy onions and remoulade as a nod to Denmark’s finest.

British company Moving Mountains has launched a new plant-based hot dog that looks, tastes and smells unusually similar to the original product. Currently available at not-for-profit vegan restaurant, Unity Diner, the 10-inch sausage is produced with sunflower seeds, carrot, coconut oil, onion and paprika. Three hot dogs featuring the Moving Mountains frankfurter are served but the simplest — “The Classic New York Dog” — is the most enjoyable.

A fresh take on a Bavarian Bierkeller, Katzenjammers is home to a vaulted bierkeller and a downstairs hall with a sausage bar. The menu comprises German classics, including a hot dog with sauerkraut, fried onions, sweet mustard and the choice between six sausage varieties: Frankfurter, peppery Pfefferbeisser, Bratwurst, Rindsbratwurst, Paprikawurst and Bockwurst.

The hot dogs at Heap’s Sausage Café aren’t particularly faithful to the traditional American-German version, but the sausages used are certainly of note. Owned and run by chef Martin Heap, the Greenwich space is home to a sausage shop and café serving a repertoire of dishes showcasing Heap’s handmade sausages, including two hot dogs. The classic hot dog features a brioche roll, onion chutney and a sausage that’s heavily seasoned with nutmeg and white pepper. The ‘Lethal Lucifer,’ on the other hand, utilises a sausage spiked with scotch bonnet chilli, finished with coleslaw.

Following the cult success of bricks and mortar sites in Soho and Fitzrovia, Bao has opened a new site on the edge of Borough Market. In addition to a new menu filled with hits such as the curry cheese bao or shia song bao featuring prawns embellished with chive — served in a long, fried bun — the restaurant is also equipped with a downstairs karaoke room: KTV. Alongside the main menu, KTV guests can also order a currywurst platter, featuring dogs served with rich curry sauce and onions.