Background: Verity Ann Lambert  (27 November 1935 - 22 November 2007) was an English television and film producer. She was the founding producer of the science-fiction series Doctor Who and she had a long association with Thames Television. Her many credits include Adam Adamant Lives!
Context: Later in 1974 Lambert became Head of Drama at Thames Television. During her time in this position she oversaw several high-profile and successful contributions to the ITV network, including The Naked Civil Servant (1975), Rock Follies (1976-77), Rumpole of the Bailey (1978-92) and Edward and Mrs Simpson (1978). In 1976 she was also made responsible for overseeing the work of Euston Films, Thames' subsidiary film production company, at the time best known as the producers of The Sweeney. In 1979 she transferred to Euston full-time as the company's Chief Executive, overseeing productions such as Quatermass (1979), Minder (1979-94) and Widows (1983).  At Thames and Euston, Lambert enjoyed the most sustained period of critical and popular success of her career. The Naked Civil Servant won a British Academy Television Award (BAFTA) for its star John Hurt as well as a Broadcasting Press Guild Award and a prize at the Prix Italia; Rock Follies won a BAFTA and a Royal Television Society Award, while Widows also gained BAFTA nominations and ratings of over 12 million--unusually for a drama serial, it picked up viewers over the course of its six-week run. Minder went on to become the longest-running series produced by Euston Films, surviving for over a decade following Lambert's departure from the company.  Television historian Lez Cooke described Lambert's time in control of the drama department at Thames as "an adventurous period for the company, demonstrating that it was not only the BBC that was capable of producing progressive television drama during the 1970s. Lambert wanted Thames to produce drama series 'which were attempting in one way or another to tackle modern problems and life,' an ambition which echoed the philosophy of her mentor Sydney Newman." Howard Schuman, the writer of Rock Follies, also later praised the bravery of Lambert's commissioning. "Verity Lambert had just arrived as head of drama at Thames TV and she went for broke," he told The Observer newspaper in 2002. "She commissioned a serial, Jennie: Lady Randolph Churchill, for safety, but also Bill Brand, one of the edgiest political dramas ever, and us ... Before we had even finished making the first series, Verity commissioned the second."  Lambert's association with Thames and Euston Films continued into the 1980s. In 1982, she rejoined the staff of parent company Thames Television as director of drama, and was given a seat on the company's board. In November 1982 she left Thames, but remained as chief executive at Euston until leaving in November of the following year to take up her first post in the film industry, as director of production for Thorn EMI Screen Entertainment. Her job here was somewhat frustrating as the British film industry was in one of its periodic states of flux, but she did produce several feature films, including Clockwise (1986). Lambert later expressed some regret on her time in the film industry in a feature for The Independent newspaper. "Unfortunately, the person who hired me left, and the person who came in didn't want to produce films and didn't want me. While I managed to make some films I was proud of--Dennis Potter's Dreamchild, and Clockwise with John Cleese--it was terribly tough and not a very happy experience."  Lambert was Chair of the British Film Institute Production Board from 1981-82.
Question: What was her most successful project?

Answer:
In 1976 she was also made responsible for overseeing the work of Euston Films, Thames' subsidiary film production company, at the time best known as the producers of The Sweeney.