1 INTRODUCTION  
2 THE VSA EXTENDED ARRAY  
3 OBSERVATIONS AND DATA REDUCTION  
3.1 Observations  
3.2 Data Reduction Pipeline  
3.3 The Daily Amplitude and Phase Measurement  
3.4 Absolute Flux Calibration  
4 IMAGING AND MOSAICING THE 33-GHZ DATA  
4.1 The Individual VSA Fields  
4.2 Mosaicing - The Final Map  
4.3 The Noise Level on the 33-GHz Map  
5 DERIVATION OF SOURCE PARAMETERS  
5.1 Applying JMFIT  
5.2 Confirmation with IRING  
5.3 Accuracy of the 33-GHz Data  
6 SPECTRA OF SELECTED HII REGIONS  
6.1 The Ancillary Data  
6.2 Modelling and Mosaicing the Ancillary Data  
6.3 Selection of HII Regions for Detailed Study  
6.4 Spectra of Individual HII Regions  
6.5 Determining the Free-Free Component  
7 ANOMALOUS EMISSION IN THE SELECTED HII REGIONS  
7.1 Excess Emission at Radio Frequencies  
7.2 33 GHz Excess Compared with FIR Bands  
7.3 The Anomalous Radio Spectrum Relative to the 100 Micron Dust Emission  
7.4 Comparison of the Present VSA Results with Other 30-GHz Measurements  
8 OTHER PHYSICAL PROPERTIES OF THE HII REGIONS  
8.1 Radio Positions Relative to the Dust  
8.2 Radio Diameters Relative to the Dust  
8.3 The Radio - FIR Spectrum of Warm Thermal Dust in HII Regions  
8.4 Temperature Dependence of Relevant Parameters  
9 CONCLUSIONS