Question: The female voices in Forget Me Not Farm were voiced by an actress of what nationality?

Context paragraphs:
Claire Lynch: Claire Lynch is an American bluegrass musician, singer, songwriter, and producer.  She is a three-time winner of the International Bluegrass Music Association's Female Vocalist of the Year honors.  She is considered one of the two best female voices in bluegrass, a recognition she shares with Dale Ann Bradley.

Eddie Leonski: Edward Joseph Leonski (December 12, 1917 – November 9, 1942) was an American soldier and serial killer responsible for the strangling murders of three women in Melbourne, Australia.  Leonski was known as the "Brownout Strangler", given Melbourne's wartime status of keeping low lighting (not as stringent as a wartime blackout).  His self-confessed motive for the killings was a twisted fascination with female voices, especially when they were singing, and his claim that he killed the women to "get at their voices."

Graciela Beltrán: Graciela Beltrán (born December 29, 1974) is a Mexican singer and actress.  She began singing in the Los Angeles area at the age of six at restaurants and parties.  She is considered to be one of the most emblematic singers of regional Mexican music.  According to MTV she is "widely known as one of regional Mexican music's most influential female voices.  Beltran is credited with helping to form the genre, as well as solidifying a woman's place in it."

Decoryah: Decoryah was an underground Finnish doom metal band formed in 1989 and disbanded in 1997.  The band came to worldwide attention with their first album Wisdom Floats which is an early example, in the contemporary Doom Metal scene, of use of male clean voices and female voices.  Decoryah members were very young at the time, nevertheless their first album was influential in the dark/doom scene.

Equal Time (TV program): Equal Time is an American political talk show that was broadcast on CNBC from 1995 to 1999.  One of the main hooks of the show was its aim to include more female voices in the typically male-dominated world of Beltway politics.  Throughout the show's run, both co-hosts were female, starting in 1995 with Republican strategist Mary Matalin as the conservative co-presenter and journalist Jane Wallace as her liberal counterpart.  Wallace left the show in 1995 and was replaced by the former White House Press Secretary Dee Dee Myers.  Matalin in turn left in 1996 and was replaced by Bay Buchanan.  In 1997, Myers was replaced by the comedian Stephanie Miller.  (A rotation of liberal co-hosts faced off with Buchanan between the time that Myers left the show and Miller was officially hired as her replacement some months later.)

Dylath-Leen (band): Dylath-Leen is a French death metal band formed in 1999.  Rather unusual among death metal bands, they feature a female singer/guitar player.  The band released their first album in 2002, which in 2005 was distributed by Thundering Records; their second album was released on Great Dane/Season of Mist.  They have played at such venues as Hellfest Summer Open Air (2007), Dokk'em Open Air (2008), and Metal Female Voices Fest (2007, 2008), and tour regularly in France, Belgium, and the Netherlands.  In 2010 they toured with Samael and Arch Enemy to promote their 3rd album recorded in January / February of this year, and played the Metal Female Voices Fest also with Arch Enemy.

Metal Female Voices Fest: Metal Female Voices Fest is a Metal festival dedicated to Front female singer, held annually in Belgium since 2003.  It is organized by the "Metal Organisation" later changed into "2 Wild 4 agency".  The festival offers to small and unknown bands to perform on a big stage, beside bigger and famous bands.

Forget Me Not Farm: Forget Me Not Farm (also styled as "Forget-Me-Not Farm") is a BBC children's television series that was originally aired on BBC One from 13 November 1990 to 18 February 1991.  Set on the eponymous Forget Me Not Farm, the show featured a scarecrow who was played by the show's creator Mike Amatt, a pair of crows named Dandelion and Burdock, a tractor named Trundle, a pig named Portly, a cow named Gracie, a sheep named Merthyr, a tanker named Topper, and a mouse named Mrs. Mouse.  All of the male animated characters were voiced by the British character actor Bob Peck while the female ones were voiced by Anna Carteret.

Anna Carteret: Anna Carteret (born 11 December 1942) is a British stage and screen actress.

List of operatic contraltos: The contralto voice in opera and classical music has a range which typically lies between the F below middle C (F3) to two Fs above middle C (F5).  In the lower and upper extremes, some contralto voices can sing from the E below middle C (E3) to two B♭ s above middle C (B♭ 5).  The contralto voice has the lowest tessitura of the female voices and is noted for its rich and deep vocal timbre.  True operatic contraltos are very rare.  The following is a list of contralto singers who have regularly performed unamplified classical or operatic music in concert halls and/or opera houses.

Supporting paragraphs: Forget Me Not Farm Anna Carteret
Answer: British