Cameron has released his tax returns for the last six years. Wisely his inheritance was split into £300,000 from his father and a £200,000 gift from his mother in 2011, tax planning which will ultimately save him £70,000 in inheritance tax if his mother survives 7 years from the gift. Though Osborne’s pre-election Budget mockery of Miliband for “avoidance of inheritance tax” looks rich now…