Question: Who directed this musical film produced by Kenneth Harper in which Melvyn Hayes appeared?

Context paragraphs:
Kenneth Harper: Kenneth Harper (1913–1998) was an English film producer.  He produced 13 films between 1954 and 1973.  He was a member of the jury at the 21st Berlin International Film Festival.

I'll Be Your Sweetheart: I'll Be Your Sweetheart is a 1945 British historical musical film directed by Val Guest and starring Margaret Lockwood, Vic Oliver and Michael Rennie.  It was the first and only musical film produced by Gainsborough Studios.  It was set at the beginning of the 20th century, and was about the composers of popular music hall songs fighting for a new copyright law that will protect them from having their songs stolen.

Prudence and the Pill: Prudence and the Pill is a 1968 British comedy film made by Twentieth Century-Fox.  It was directed by Fielder Cook and Ronald Neame and produced by Kenneth Harper and Ronald J. Kahn from a screenplay by Hugh Mills, based on his own novel.  The music score was by Bernard Ebbinghouse and the cinematography by Ted Moore.

Summer Holiday (1963 film): Summer Holiday is a British CinemaScope and Technicolor musical film featuring singer Cliff Richard.  The film was directed by Peter Yates (his debut), produced by Kenneth Harper.  The original screenplay was written by Peter Myers and Ronald Cass (who also wrote most of the song numbers and lyrics).  The cast includes Lauri Peters, Melvyn Hayes, Teddy Green, Jeremy Bulloch, Una Stubbs, Pamela Hart, Jacqueline Daryl, Lionel Murton, Madge Ryan, David Kossoff, Nicholas Phipps, Ron Moody and The Shadows.  Herbert Ross choreographed the musical numbers.

Melvyn Hayes: Melvyn Hayes (born Melvyn Hyams, 11 January 1935) is an English actor known for playing the effeminate Gunner (later Bombardier) "Gloria" Beaumont in the 1970s BBC sitcom "It Ain't Half Hot Mum", and the Cliff Richard hit musical films The Young Ones and Summer Holiday

I'll Take Romance (film): I'll Take Romance is a 1937 romantic musical film directed by Edward H. Griffith, starring Grace Moore, Melvyn Douglas, Helen Westley, Stuart Erwin and Margaret Hamilton.

The Seat Filler: The Seat Filler is an American romantic comedy musical film produced by the Company Production of Magnolia Home Entertainment, Seat Filler Productions, Shake Martin Films and Strange Fruit Films, which released in 2004.  It stars Kelly Rowland, Duane Martin, Mel B, Kyla Pratt and Shemar Moore.  The movie received mainly average reviews.  The film is also recognized as Duane Martin's first (and to date, only) appearance in a musical film and Kelly Rowland's most successful film in a leading role performance.

Coz Ov Moni: Coz Ov Moni - The First Pidgen Musical Film in the World is a 2010 musical film produced by the FOKN BOIS and directed by independent Ghanaian filmmaker King Luu.

Carry On England: Carry On England is the 28th in the series of "Carry On" films to be made.  It was released in 1976 and featured "Carry On" regulars Kenneth Connor, Jack Douglas, Joan Sims and Peter Butterworth.  It was second and last "Carry On" film for Windsor Davies, Diane Langton, and Peter Jones, while Patrick Mower, Judy Geeson and Melvyn Hayes make their only appearance in a "Carry On" film.  It was followed by "That's Carry On" in 1977 and "Carry On Emmannuelle" in 1978.

That Certain Age: That Certain Age is a 1938 American musical film directed by Edward Ludwig and starring Deanna Durbin and Melvyn Douglas.  Based on a story by F. Hugh Herbert, the film is about a dashing reporter who returns from covering the Spanish Civil War and is invited to spend time at his publisher's home, where his adolescent daughter develops a crush on him.  The family does their best to sway the young girl's feelings away from the reporter, but it is a challenge, as she is at "that certain age".  Distributed by Universal Pictures, the film received Academy Award nominations for Best Music and Best Sound Recording.

Supporting paragraphs: Melvyn Hayes Summer Holiday (1963 film)
Answer: Peter Yates