1 INTRODUCTION
2 OBSERVATIONS
2.1 Unlensed sources in the South Pole Telescope millimetre-wave point-source catalogue
2.2 APEX-LABOCA observations
2.3 Herschel-SPIRE observations
3 DATA ANALYSIS
3.1 LABOCA source extraction
3.2 LABOCA flux deboosting
3.3 Herschel-SPIRE photometry
4 RESULTS
4.1 Radial counts analysis
4.2 Number counts within 240 arcsec
4.3 Fractional over density
4.4 SPIRE colours
4.5 Star-formation rates
5 DISCUSSION
6 CONCLUSIONS