UK PM Cameron is again adding to the on-going saga of the Pfizer/Astrazeneca farce by now saying he is seeking the best possible guarantees from Pfizer.

He has told parliament during PMs Questions:

This govt has been absolutely clear that the right thing to do is to get stuck into seek the best possible guarantees on British jobs, on British investment, and British science

The govt involvement in this deal and the subsequent delay/postponement in any take-over is another GBP negative as I have highlighted before with many traders having bought on the initial bid talks.