End gvt. contracts to companies which avoid UK tax, or advise on tax avoidance

Many companies - including those running publicly-funded services - do not pay tax on the money they make in the UK, though their businesses & employees depend on the services & infrastructure paid for by UK taxpayers. Meanwhile large accountancy & management consultancy firms benefit from lucrative government contracts while also advising clients on how to avoid paying tax. Public money - grants subsidies & contracts - should not be awarded to tax-avoiding companies or those advising them.