1 INTRODUCTION  
2 SED CONSTRUCTION  
2.1 Catalogues  
2.2 Catalogue Cross-matching  
2.3 Source Compactness and Complexity  
2.4 Source Variability  
3 BAYESIAN MODELLING  
3.1 Models  
3.2 Bayesian Inference  
3.3 Parameter Estimation  
3.4 Model Comparison & Selection  
3.5 Source Classification  
3.6 Implementation  
4 RADIOSED VERIFICATION & FIRST RESULTS  
4.1 Parameter Recovery & Sampling Errors: Nestcheck   
4.3 Test Sources  
5 CONCLUSIONS & FUTURE WORK