Question: Which film based on a novel written by Mary Hayley Bell in 1959, had cast member Ashley Lloyd?

Context paragraphs:
Juliet Mills: Juliet Maryon Mills (born 21 November 1941) is a British and American actress.  She is the daughter of actor Sir John Mills and Mary Hayley Bell and the eldest of three siblings: her younger siblings are actress Hayley Mills and director Jonathan Mills.

Crispian Mills: Crispian Mills (born 18 January 1973 as Crispian John David Boulting), also known as Krishna Kantha Das, is an English singer-songwriter, guitarist, and film director.  He is the son of actress Hayley Mills and director Roy Boulting, the grandson of Sir John Mills and Mary Hayley Bell, nephew of Juliet Mills and director Jonathan Mills, and half-brother to Jason Lawson.

Hayley Mills: Hayley Catherine Rose Vivien Mills (born 18 April 1946) is an English actress.  The daughter of Sir John Mills and Mary Hayley Bell, and younger sister of actress Juliet Mills, Mills began her acting career as a child and was hailed as a promising newcomer, winning the BAFTA Award for Most Promising Newcomer for her performance in the British crime drama film "Tiger Bay" (1959), the Academy Juvenile Award for Disney's "Pollyanna" (1960) and Golden Globe Award for New Star of the Year – Actress in 1961.  During her early career, she appeared in six films for Walt Disney, including her dual role as twins Susan and Sharon in the Disney film "The Parent Trap" (1961).  Her performance in "Whistle Down the Wind" (a 1961 adaptation of the novel written by her mother) saw Mills nominated for BAFTA Award for Best British Actress.

Whistle Down the Wind (musical): Whistle Down the Wind is a musical with music composed by Andrew Lloyd Webber, who also co-wrote its book with Patricia Knop and Gale Edwards, and its lyrics were written by Jim Steinman.  It is based on the 1961 film "Whistle Down the Wind", whose source novel of the same name was written by Mary Hayley Bell in 1959.

Whistle Down the Wind (novel): Whistle Down the Wind was a novella written by Mary Hayley Bell and illustrated by Owen Edwards.  It was published in 1959 by Boardman and retailed for 12 shillings and sixpence (62½p).  The central characters are three children — Swallow, Brat and Poor Baby.  The story of the Great Secret is told by Brat.

Mary Hayley Bell: Mary Hayley Bell, Lady Mills (22 January 1911 – 1 December 2005) was an English actress and writer, married for 64 years to actor Sir John Mills.  Her novel "Whistle Down the Wind" was adapted as a film, starring her teenaged daughter, actress Hayley Mills.

Ashley Lloyd: Ashley Lloyd (billed as Ashley Luke Lloyd) (born (1991--)6 1991 ) is a British actor and dancer, who has performed in hit musical theatre shows such as "Billy Elliot the Musical" and "Whistle Down the Wind".  In 2012 Lloyd appeared in the new musical "Loserville" at the Garrick Theatre in London.  Lloyd is now appearing in the Original London Cast of Dreamgirls at The Savoy Theatre

Sky West and Crooked: Sky West and Crooked (known in the United States as Gypsy Girl) is a 1965 romantic drama film, featuring actress Hayley Mills.  The film was directed by her father, John Mills, and was co-written by her mother, Mary Hayley Bell.

Whistle Down the Wind (film): Whistle Down the Wind is a 1961 British film, directed by Bryan Forbes and with screenplay by Keith Waterhouse and Willis Hall.  The film is based on the 1959 novel of the same name by Mary Hayley Bell and stars her daughter, Hayley Mills.

Sir John Mills' Moving Memories: Sir John Mills' Moving Memories is a British documentary film featuring 16mm color home movies shot by the actor Sir John Mills.  It documents his life between 1946 and 1969, directed and edited by Marcus Dillistone and produced by his son Jonathan Mills.  Commentary was provided by Sir John (who was over 90 years old at the time), Hayley Mills, Juliet Mills and Sir Richard Attenborough.  His wife Mary Hayley Bell is also seen towards the end of the film listening to her husband singing at the piano.  The scene was later to be screened in full when Sir John appeared on the Parkinson show.

Supporting paragraphs: Ashley Lloyd Whistle Down the Wind (musical)
Answer: Whistle Down the Wind