Found this article which looks at GPs being 'paid to prescribe ineffectove drugs' with 'up to a fifth of an average GP’s salary is effectively commissions on drugs':
From the website of Patrick Holford, 'a pioneer in new approaches to health and nutrition [and] leading spokesman on nutrition in the media, specialising in the field of mental health' so not without an agenda of his own. Takes a different view on statins as you might expect.
Still, at least we don't (yet?) have it as bad as in the US, where from what I hear doctors are routinely wined & dined by pharmaceutical corporations as a way to basically bribe them into prescribing their products.