David Whittaker himself has presented this analysis of the notes of "Star Dust" and "It Happened Then", concluding that they're completely different, with only four notes common. This is to rebut the inaccurate notion now in Wikipedia that David copied the track.
" i.e. Only 1st 4 lead notes similar, not bass, nor timing"
Lazy Jones - Star Dust notes
Bass:
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| C1 c2 c1 c2 | C1 c2 c1 c2 | Octaves
| C1 c2 c1 c2 | C1 c2 c1 c2 | Octaves
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| F1 f2 f1 f2 | G1 g2 g1 g2 | Octaves
| C1 c2 c1 c2 | C1 c2 c1 c2 | Octaves
====================================
Lead:
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| . c3 d#3 f3 | G3 . . . | Staccato
| . c3 d#3 f3 | G3 g#3 g3 d#3 | Staccato and Diff
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| F3 . . . | D#3 . g3 c3 | Staccato and diff end
| . . . . | . . . . | nothing
====================================
It Happened Then notes Different KEY (D not C)
Bass:
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| D1 d1 d1 d1 | D1 d1 d1 d1 | NOT Octaves
| E1 e1 e1 e1 | E1 e1 e1 e1 | all DIFF
==================================
| G1 g1 g1 g1 | A1 a1 a1 a1 | NOT Octaves
| D1 d1 d1 d1 | D1 d1 d1 d1 | NOT Octaves
====================================
Lead:
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| . d4 f4 g4 | A4------------- | cont. not staccato
| . g#4 e4 g#4 | A4 b4 a4 g#4 | All VERY Diff
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| G4------------- | F4----- a3----- | cont. not staccato
| D4------------- | . . . . | cont. not staccato
=====================================
i.e. Only 1st 4 lead notes similar, not bass, nor timing