1 INTRODUCTION

2 DATA  
2.1 X-ray data  
2.2 X-ray luminosities  
2.3 S2CLS  
2.4 LABOCA data  
2.5 FIR data

3 RESULTS AND DISCUSSION  
3.1 Detection rates of submillimetre sources  
3.2  ${\bf850~\upmu m}$  stacked fluxes  
3.3 Multi-wavelength stacked fluxes  
3.4 SED fitting  
3.5 Star-formation rates with AGN luminosity  

4 CONCLUSIONS