I've just did a search of the very handy BBC online archive catalogue, and it has it listed here: http://open.bbc.co.uk/catalogue/infax/programme/LMAF076L
Looks like it's actual title is "STAR WARS, MUSIC BY JOHN WILLIAMS " which tallies with the screenshot on the site you found: http://www.mahawa.jw-music.net/films/bbc.htm
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STAR WARS, MUSIC BY JOHN WILLIAMS
* A television programme
* BBC Programme Number: LMAF076L
* First broadcast on 1980-05-18
Description
(reveal extra detail) (hide extra detail)
* JOHN WILLIAMS has the composer credit for some 45 feature films. Prog looks at the craft & the pressures of film music through his work & has extracts from a number of his films. We see him at work on the "Empire Strikes Back".
Broadcast history
* 18 May 1980 19:15-20:14 (BBC 2)
Contributors
* Steven Spielberg
* George Lucas
* John Williams (composer)
* Gary Kurtz
* Irvin Kershner
* Herb Spencer
* Lionel Newman
* Ben Burt
* Claudine Carlson
* Ken Wannberg
* Antony Horder (Narrator)
* David Buckton (Producer)
Extra details:
# Intvs with Williams, Steven Spielberg & other film industry personnel. WILLIAMS received classical training. First started composing for films in late 50s: has written 45 feature film scores in 20 yrs. Prog shows him in process of composing & conducting music for 'The Empire Strikes Back', sequel to 'Star Wars'. Talks thruout abt process, style, inspiration. Incs clips from some of best known films to illus his technique. s thruout Williams at piano composing. Seqs thruout composing, recording process. Intvs: Williams thruout (inc 18.24-18.49, 19.04-19.28, 21.44-22.00, 33.49-34.05, 40.44-41.23)
# Gary KURTZ (Dir Empire...) change in style from 60's-'Star Wars' needed trad romantic music (3.44-4.00) Irvin KERSHNER (Prod Empire...) music as dialogue (4.00-4.29, 15.23-15.39) Steven SPIELBERG (Dir): film dead without music: integral part. 60's: realism-lack of music. Now back to 'full blown symphonic music' (34.05-35.44) on 'Close Encounters' music (38.33-39.32) Incs seqs: vars 'The Empire Strikes Back' shooting on location in Norway crew, equipment, spec vehicles, shooting in snow (0.00-1.18); WILLIAMS conducts London Symphony Orchestra at Anvil Studios Denham (1.49-2.59, 16.24-18.24, 52.00-53.33) WILLIAMS in control room at Anvil with George LUCAS, KERSHNER & KURTZ (3.28-4.29)
# WILLIAMS at 'spotting sessions' (pre-composing viewing of film)(6.05-7.14, 13.08-15.23), in sound effects dubbing room (24.59-25.44), viewing seqs on Moviola with Ken WANNBERG (music editor), composing, with orchestrator Herb SPENCER & re-viewing with WANNBERG (46.24-52.00). Lionel NEWMAN (C20th Fox's Head of music) et al at recording session at Anvil (53.33-55.09), WILLIAMS relaxing at home accompanying singer Claudine CARLSON on piano (32.19-33.49) Ben BURT (demos how sound effects for spaceship in trouble)('Star Wars') (25.44-28.34)
# Film Clips: Star Wars (4.29-6.05)(28.34-28.59); 'How to Steal a Million' (7.14-11.18); 'The Empire Strikes Back' (56.34-58.40) & without music track (15.39-16.24) 'Images'(19.28-21.39); 'Jane Eyre' (22.00-24.59); 'Towering Inferno' (25.59-31.28); 'Jaws' (35.44-38.12); 'Close Encounters of the Third Kind' (39.32-40.44, 41.23-42.12); Superman (43.08-45.44). All clips demo aspects of Williams' music.
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I also found this edition of blue peter listed, which might be of interest: http://open.bbc.co.uk/catalogue/infax/programme/LCHA150K
"ITEM 02:EMPIRE STRIKES BACK: Simon GROOM & Chris WENNER [meet?] the robots from 'The Empire Strikes Back'. R2-D2, C-3PO, Chewbacca & Darth Vader appear. Clip from 'The Empire Strikes Back'. Interview with Mark HAMILL & Carrie FISHER, finishes with guests given 'Star Wars stew'. "