A couple of reviewers were interested in the soundtrack for this series, so here are some sources patched together from a list that was posted on a James Frain website in the early 2000s, which apparently no longer exists. Based on the A&E version of the show these are the musical references, with attempts to match pieces with scenes. Incomplete but this should give people somewhere to start if they are trying to find out more about the music. Boyd's novel specifically mentions that Lorimer is listening to African music, and that seems to be an inspiration for the soundtrack. Apologies for any errors.
1)African-sounding music, drums/vocal, as Lorimer drives to warehouse - Yiriyayo (Baaba Maal)
2) beat instrumental, after Rappaport, as Lorimer sees Flavia for the first time
3) en route to sleep lab after company party - The Greatest Thing (Nat King Cole)
4) he goes to visit his family, with daffodils - Wassiye (Habib Koite)
5) classical music in Fortress Sure ad (stay true to yourself) Bach gavotte
6) electronic beat, en route to Fedora Palace fire site
7) watching TV after awakening, 5) again
8) beat - getting ready to meet Rintoul
9) Afro-Cuban, as he drives to Silverton house - M'Beddimi (Cheikh Lo)
10) en route to Gale-Harlequin - vocal and drums - Yiriyayo (Baaba Maal) repeats 1)
11) en route to meet Flavia - African (Cheikh Lo)
12) pop music playing at taxi office
13) driving to Priddion's Farm - Ye Ye Ye (Geoffrey Oryema)
14) classical music over dinner
15) classical music, repeat of 14), hurried departure
16) pop instrumental, en route to hotel site (same as 6)
17) Torq moves in - playing on stereo, Fejigno (Maryam Mursal)
18) en route to dinner with Flavia - N'jarinu Garab (Cheikh Lo)
19) dinner - slow acoustic guitar instrumental
20) after dinner - piano - Awa Y'okeyi (Papa Wemba)
21) Torq making out - pop
22) fanfare music at Sherriffmuir party
23) sees Flavia again, gives her the house key - theme from 19)
24) electronic beat - knocks over flower stall, puts on helmet - Ladilikan (Djigui)
25) becoming a whistle blower - vocal and stringed instrument - Kothbiro (Ayub Ogada)
26) acoustic guitar - Flavia at the new house - theme from 19)
27) frantic drive to Heathrow - Kufilaw(Maryam Mursal)
28) repeat 20) - Awa Y'okeyi (Papa Wemba)
Artist/Album Info (where possible)
1) "Yiriyayo" - Baaba Maal, Nomad Soul
3) "Nature Boy" - Nat King Cole, The Ultimate Collection
4) "Wassiye"-Habib Koite & Bamada, Ma Ya (Putomayo) - see also Africa (Putomayo) and Mondo Africa
5) "Gavotte 1 from Suite 3" - Bach, Essential Classics Vol. 1
9) "M'Beddemi" - Cheikh Lo, Bambay Gueej
11) "African" - Cheikh Lo, Bambay Gueej
13) "Ye Ye Ye" - Geoffrey Oryema, Exile
17) "Fejigno" - Maryam Mursal, The Journey (Real World label)
18) "N'Jarinu Garab" - Cheikh Lo, Bambay Gueej
20) "Awa Y'okeyi" - Papa Wemba, Molokai
24) "Ladilikan" - Djigui, Frikyiwa Collection Vol. 1 (Six Degrees Label)
25) "Kothbiro" - Ayub Ogada, En Mana Kuoyo (Real World label)
27) "Kufilaw" - Maryam Mursal, The Journey (Real World label)
Also ...
"Harvest of the Steppes" - G Behar, USSR & Eastern Europe (KPM Music)
"Cool Ticket" - Warren Bennett & Simon Smart, Essential Rhythm
"Clutch" - Shea Seger, Clutch Single (and also on May St. Project)
"Optomize (a)" - Richard Cottle, Dance Indie Mix 2
"Boccherini - Minuet" - Boccherini, Essential Classics Vol. 1
"Rondeau from Abdelazer" - Purcell, Essential Classics Vol. 1
"Flight of the Bumblebee" - Rimski-Korsakov, Classical Selection 2
"The Water Music - air Hornpipe" - Handel, Essential Classics Vol. 1
"Kyrie, Gott Vater in Ewigkeit" - J.S. Bach, Naxos