Question: In what British film studio did Herbert Wilcox produce Sorrell and Son?

Context paragraphs:
Elstree Studios: Elstree Studios is a generic term which can refer to several current and defunct British film studios and television studios based in or around the towns of Borehamwood and Elstree in Hertfordshire.  Studios have been located here since film production began in the area during 1914.

The Only Way (1927 film): The Only Way is a 1926 British drama film directed by Herbert Wilcox and starring John Martin Harvey, Madge Stuart and Betty Faire.  It was adapted from the play "The Only Way" which was itself based on the novel "A Tale of Two Cities" by Charles Dickens.  John Martin Harvey had been playing Carton in the play since 1899 and it was his most popular work.  It cost £24,000 to make and was shot at Twickenham Studios.  The film was a commercial success and reportedly took over £53,000 in its first two years on release.  It was a particularly notable achievement given the collapse in British film production between the Slump of 1924 and the passage of the Cinematograph Films Act 1927 designed to support British film making.

Sorrell and Son (1934 film): Sorrell and Son is a 1934 British drama film directed by Jack Raymond and written by Lydia Hayward.  The film stars H. B. Warner, Margot Grahame, Peter Penrose, Hugh Williams and Winifred Shotter.  It was made by the producer Herbert Wilcox at Elstree Studios.  It is based on the 1925 novel of the same title by Warwick Deeping.  A silent version had previously been released in 1927, also starring Warner.

Astra Films: Astra Films was a British film production and distribution company of the silent era.  It was set up in Leeds following the First World War by the film director Herbert Wilcox, his younger brother Charles Wilcox and H.W. Thompson, a leading figure in film distribution in the North of England.  After the company's initial success, Wilcox left the firm to set up on his own and rose to become one of the most successful independent producer-directors in the world.  After a merger the company released films under the name Astra-National.

Victoria the Great: Victoria the Great is a 1937 British historical film directed by Herbert Wilcox and starring Anna Neagle, Anton Walbrook and Walter Rilla.  When Laurence Housman's play "Victoria Regina" was banned by the Lord Chamberlain (in 1935, the royal family could not be shown on the British stage); its subsequent Broadway success prompted King Edward VIII to commission producer Herbert Wilcox to turn it into a film, commemorating the centenary of Victoria's reign.  The film biography of Queen Victoria concentrates initially on the early years of her reign with her marriage to Prince Albert and her subsequent rule after Albert's death in 1861.  It was released in the year of King George VI's coronation, which was also the centennial of Victoria's own accession to the throne.  The movie was so successful that a sequel appeared the following year, "Sixty Glorious Years".

Dawn (1928 film): Dawn is a 1928 British silent war film directed by Herbert Wilcox and starring Sybil Thorndike, Gordon Craig and Marie Ault.  It was produced by Wilcox for his British & Dominions Film Corporation.  The film was made at Cricklewood Studios with sets designed by Clifford Pember.

Wolves (1930 film): Wolves is a 1930 British crime film directed by Albert de Courville and starring Charles Laughton, Dorothy Gish and Malcolm Keen.  A woman is captured by a gang of criminals operating in the Arctic but the leader later helps her escape.  It was based on a play by Georges Toudouze.  It was produced by Herbert Wilcox's British and Dominions Film Corporation, but filmed at the Blattner Studios whilst sound equipment was being installed at Wilcox's nearby Imperial Studios, and the sound was added after filming was completed.  It was Gish's first sound film, and was Laughton's second talkie (but his first sound drama), having completed a film of a musical variety performance earlier the same year.  Of 57 minutes original duration, it was released in 1936 in a 37-minute version retitled "Wanted Men".

Yes, Mr Brown: Yes, Mr Brown is a 1933 British musical comedy film directed by Herbert Wilcox and starring Jack Buchanan, Hartley Power, Elsie Randolph and Margot Grahame.  The film is currently missing from the BFI National Archive, and is listed as one of the British Film Institute's "75 Most Wanted" lost films.

London (1926 film): London (1926) is a British silent film, directed by Herbert Wilcox and starring Dorothy Gish.  The film was adapted by Wilcox from a short story by popular author Thomas Burke.  The British Film Institute considers this to be a lost film.

London Melody: London Melody is a 1937 British musical film directed by Herbert Wilcox and starring Anna Neagle, Tullio Carminati and Robert Douglas.  It was made at British and Dominions Imperial Studios, Elstree and Pinewood Studios by Wilcox's independent production company and distributed by J. Arthur Rank's General Film Distributors.  It was also released with the alternative title Look Out for Love.

Supporting paragraphs: Sorrell and Son (1934 film) Elstree Studios
Answer: Elstree Studios