This article on The Poke did make me chuckle:
It does, however, raise the point as to why what companies have to pay in Corporation Tax is open to interpretation. The Tax Code is a convoluted mess; it’s how the UK hides it’s corruption. What a company has to pay can be argued up or down – so naturally companies hire accountants to argue their tax bills down. Why not? I would.
The whole Tax Code needs to be ripped up and written again. The simpler, flatter, more transparent, and lower taxes are, the less they will be evaded.