I found this site which outlines the value of the pharmaceutical industry to the British Economy, there is information there that would take me a few days to decipher but someone might understand the details better than I can, suffice it to say that they contributed £7 billion in 2009: http://www.abpi.org.uk/industry-info/knowledge-hub/uk-economy/Pages/voi.aspx

There is a pdf that summarises the information if you want to read in depth. Since 2008 they have risen to the top of the fiscal contributors in the UK. This just shows you how much governments have invested in keeping the Pharma's sweet/quiet.