Question: What is the name of that British science fiction / musical fantasy film loosely based on "Romeo and Juliet" staring the North Irish Actor who played Charlie Fairhead?

Context paragraphs:
Romeo × Juliet: Romeo × Juliet (ロミオ×ジュリエット , Romio to Jurietto ) is an anime television series, loosely based on William Shakespeare's classical play, "Romeo and Juliet", along with numerous references and characters from other Shakespearean plays.  Though the anime borrows mostly from Shakespeare's story, the manga adaptation differs extensively from the original.  "Romeo × Juliet" was broadcast in Japan on Chubu-Nippon, broadcasting from April 4, 2007 to September 26, 2007.  In 2009, "Romeo × Juliet" was dubbed into English and released by Funimation Entertainment.

North Irish Horse: The North Irish Horse is a yeomanry unit of the British Territorial Army raised in the northern counties of Ireland in the aftermath of the Second Boer War.  Raised and patronized by the nobility from its inception to the present day, it was one of the first non-regular units to be deployed to France and the Low Counties with the British Expeditionary Force in 1914 during World War I and fought with distinction both as mounted troops and later as a Cyclist Regiment, achieving 18 battle honours.  The regiment was reduced to a single man in the inter war years and re-raised for World War II, when it achieved its greatest distinctions in the North African and Italian campaigns.  Reduced again after the Cold War, the regiment's name still exists in B (North Irish Horse) Squadron, the Queen's Own Yeomanry and 69 (North Irish Horse) Signal Squadron (V), part of 32 Signal Regiment.

Kevin Smith (editor): Kevin Smith was an active British science fiction fan from the mid-1970s to the mid-1980s, producing such science fiction fanzines as "Drilkjis" (with Dave Langford) and "Dot", writing for fanzines ("Nabu", "Space Junk", and others), chairing British science fiction conventions, editing a 1979 anthology of British fanwriting titled "Mood 70" for Seacon '79, the 37th World Science Fiction Convention, and serving from 1980 to 1982 as editor of "Vector", the critical journal of the British Science Fiction Association.  He won the TransAtlantic Fan Fund in 1982.

Charlie Fairhead: Charlie Fairhead, played by Derek Thompson, is a fictional character from the BBC British medical drama "Casualty".  He is the longest-serving character having played the role of Charlie for over 30 years and the only remaining original character to have appeared continuously since the first episode on 6 September 1986.  Thompson chose to take a nine-month break from the show in early 2004.  Charlie left the show in series 18 on 17 July 2004 and after five months, returned on 1 January 2005 in series 19.  At the end of series 19, Charlie left again as Thompson returned to his break from the show, with Charlie's exit scenes airing on 20 August 2005.  After four months off-screen, Charlie returned in the series 20 Christmas crossover with "Holby City", which aired on 24 December 2005.  Thompson has remained with the show since, but regularly takes breaks of around two months every year.

Derek Thompson (actor): Derek Thompson (born 4 April 1948) is a Northern Irish actor, most notable for playing Charlie Fairhead in the long-running BBC television medical drama series "Casualty".  Thompson has played the role since the series' inception in 1986.

Gnomeo &amp; Juliet: Gnomeo & Juliet is a 2011 British-American 3D computer-animated fantasy romantic comedy family film loosely based on William Shakespeare's play "Romeo and Juliet".  Financed by Disney and released through its Touchstone Pictures banner, the film was independently produced by Rocket Pictures and animated by Starz Animation.  It was written and directed by Kelly Asbury, and the two title characters are voiced by James McAvoy and Emily Blunt.

Gonks Go Beat: Gonks Go Beat is a 1965 British science fiction / musical fantasy film, directed by Robert Hartford-Davis.  It stars Kenneth Connor and Frank Thornton.  "Gonks Go Beat" is loosely based on the "Romeo and Juliet" storyline and features 16 musical numbers performed by a variety of artists, including Lulu and the Luvvers, The Nashville Teens and members of the Graham Bond Organisation including Ginger Baker, Jack Bruce and Dick Heckstall-Smith.  Other musical contributors were – and remained – obscure.  The film includes an early appearance by the actor Derek Thompson performing with his twin sister Elaine (credited as Elain).

Romeo &amp; Juliet: Sealed with a Kiss: Romeo & Juliet: Sealed with a Kiss is a 2006 American animated romantic fantasy film loosely following the play "Romeo and Juliet" by William Shakespeare.  The film is about two star-crossed seals, Romeo and Juliet (voiced by Daniel and Patricia Trippet respectively), who fall in love against the wishes of their warring families.  It was released in Europe in mid-2006 and on October 27 in the United States.

Vargo Statten Science Fiction Magazine: Vargo Statten Science Fiction Magazine (later Vargo Statten British Science Fiction Magazine, The British Science Fiction Magazine and The British Space Fiction Magazine) was a British science fiction magazine which published nineteen issues between 1954 and 1956.  It was initially published by Scion Press, with control passing to a successor company, Scion Distributors, after Scion went bankrupt in early 1954.  At the end of 1954, as part payment for a debt, Scion Distributors handed control of the magazine to Dragon Press, who continued it for another twelve issues.  E.C. Tubb and John Russell Fearn were regular contributors, and Kenneth Bulmer also published several stories in the magazine.  Barrington Bayley's first published story, "Combat's End", appeared in May 1954.  The editor was initially Alistair Paterson, but after seven issues Fearn took the helm: "Vargo Statten" was one of Fearn's aliases, and the magazine's title had been chosen because of his popularity.  Neither Paterson nor Fearn had enough of a budget to attract good quality submissions, and a printing strike in 1956 brought an end to the magazine's life.

Characters of Casualty: "Casualty" is a British medical drama television series that premiered on 6 September 1986 on BBC One.  The series was created by Jeremy Brock and Paul Unwin.  It is set in the fictional Holby City Hospital, in the equally fictitious city of Holby, and features occasional crossovers of characters and plots with spin-off show "Holby City".  "Casualty" follows the professional and personal lives of the doctors, nurses, paramedics, hospital management and patients at Holby General.  It features an ensemble cast of regular characters, and began with 10 main characters in its first series, all but two – Charlie Fairhead (played by Derek Thompson) and Lisa "Duffy" Duffin (played by Cathy Shipton) – have since left the show.  Many main characters have been written in and out of the series since.  In addition, "Casualty" features guest stars each week, as well as recurring guests that take part in story arcs that span a portion of a series or multiple series'.

Supporting paragraphs: Gonks Go Beat Derek Thompson (actor)
Answer: Gonks Go Beat