How much tax can Rupert Murdoch reasonably be said to have avoided or
evaded in the UK over the last ten years?  Just looking for a single
amount of money.

By "avoided or evaded" tax, I mean the difference between how much tax
he actually has paid, and how much tax he would have had to pay if he
had been charged at normal UK tax rates like everyone else, without
having anything offshore or using other avoidance or evasion tactics
that most people do not use.  I'm including actual non-payment of owed
tax as an avoidance tactic.  However, I'm not including tax
mitigiation as avoidance or evasion.

I will double the price if the same question is answered for the USA
and for Australia as well.

Your going to have more luck if you raise that price about $99,990.