Wahaca, the Mexican street food restaurant concept owned by Thomasina Miers and Mark Selby, is to launch a mobile unit called the Mexican Street Kitchen. The company is currently converting a 1958 Citroen HY van into a takeaway truck, which it plans to use to test out new recipes that cant be found in its current four-string restaurant estate. The group is set to install a state-of-the-art Robata charcoal grill into the vehicle, which it believes will be the first of its kind in a van in London. In a comment on its Facebook page the company said: “We’re going to be using the Mexican Street Kitchen to test out new recipes that you can’t find in our restaurants, and we’d like you to be a part of it. We’ll be holding events asking you to come and help us test out new recipes, new cuts of meat, new seasonal vegetables and new ways of serving them. We want you to help us as we develop exciting new street food recipes that (if they pass the 'Tommi Test') could be added to our restaurant menu.” The company announced earlier this year that is targeting an estate of up to 20 restaurants in Greater London, with plans to open two new sites this year. The group’s fifth site, a 150-cover unit, is set to open in September in the new Stratford Westfield shopping centre.