1 Introduction  
2 Polarimetric Modelling of WALOP-South  
2.1 Optical Model of the WALOP-South Instrument  
2.2 Mueller Matrix Modelling  
2.3 Polarimetric Cross-talk and Zero-offset  
3 Theoretical Calibration Model of WALOP-South  
3.2 Instrument Transmission Model  
3.3 Calibration Model Results  
4 Lab Set Up Tests  
5 Conclusions