Tony Blair has banked over £13 million to mark his most financially successful year since stepping down as prime minister. [HuffPost] Blair's wealth, including a London home, a country estate and numerous other properties, is estimated to come to £70m. The former PM has built up his fortune over the years as an official adviser to investment bank JP Morgan and Swiss-based global insurance giant Zurich International. Blair also advises governments such as the Kazakhstan regime and earns as much as £250,000 a time for private speeches and appearances. The bumper financial results for the 12 months to April 2013 have been revealed in the latest accounts for Blair's two firms, Windrush Ventures and Firerush Ventures, which were lodged with Companies House last week. Windrush Ventures, which employs 35 people, posted a £14.9m turnover and a post-tax profit of nearly £2m, marking a £650,000 rise over the previous year. It paid corporation tax on its profits of £653,000, the accounts show. Windrush also paid out £12.1 million in expenses, to cover the cost of office rents, travel and hotel bills for Blair and his entourage. Blair's staff are estimated to earn an average of £86,000, with the company's highest paid director getting £273,000. One City accountant told the Sunday Telegraph: “These numbers are a big improvement on last year. Mr Blair has had a very good year. This is a bumper year – his best year yet.” A statement on Tony Blair's website said: "The latest annual financial statements...[are]...the financial statements of the two companies through which the operating costs of the Tony Blair group’s global activities are paid. They do not represent his earnings or the earnings or the profit of his businesses and are not referable to them."