Dustin, the reason that large swathes of England appear to be tory is that constutuencies are based on roughly equal population size, therefore a country tory seat will cover a large georaphic area. Labour has more MPs in urban areas so when you look at a map they don't appear to cover such a large area. If you looked at a politcal map of Scotland you might be lead to believe that it is mostly lib dem. A couple of constituencies in the higlands and islands have Lib dem MPs, which cover a huge, sparesely populated area. It would be foolish to believe that a geographical map is representative of the political ideology of any region of the UK.
You're right I don't know what is being done about it, however the previous comment was pretty much a repeat of an article by a business journalist in the Independent a few weeks ago. after reading it I thought: 'your right, if the coalition government had wanted to close a lot of tax loopholes they would have done so by now. By not doing so they are sending out a statement that tax avoidance is acceptable.'
The outgoing coalition government has had 5 years to tackle the problem of corporate/personal tax avoidance/evasion yet has chosen to do nothing about it.
The fact that there has been only 1 prosecution in the UK from HSBCs Swiss money hiding, but the French are going after hundreds of people should tell you all need to know about the Conservative attitude to taxing the wealthy and why they don't deserve 5 more years.