Rather embarrassingly, I allow myself to get lost along the cramped sidewalks of Soho, on the odd occasion. Even with my eight years as an avid London restaurant collector and in the face of advancing technology (Turn the phone around. And again.), I still can’t work out the differences between Beak Street and Lexington Street. Ultimately this is the reason it has taken me so long to visit Fernandez & Wells, already a favourite sandwich bar for many food lovers