Prince Charles 'expresses concerns over royal succession reforms' It raises the prospect of a future heir to the throne's children being brought up in that faith. That would result in the difficult constitutional scenario of the following heir, due to become Supreme Governor of the Church of England, being a Catholic and therefore barred from the throne. A source told the Mail that Prince Charles had been told such a problem could be resolved by negotiations with the Vatican - a solution he was said to have found "unsatisfactory and unconvincing." The prince was also said to have raised questions about the impact of changing the rules of royal succession on other titles currently passed down the male line. There have already been calls for changes in the law so that female heirs can succeed to a hereditary peerage. The prince's concerns could deal a blow to plans to change the royal succession law, after David Cameron struck a deal with the 15 other countries where the Queen is head of state that the rules must be overhauled. There had been fears of controversy if the Duke and Duchess of Cambridge had a daughter who would be overtaken in line for the throne by any future male siblings. The changes mean that for all descendants of the Prince of Wales, a younger son will no longer take precedence over an elder daughter. Reports of the Prince's concerns come as he discloses in an interview how the prospect of becoming a grandfather has reinforced his environmental beliefs because he does not want to "hand on an increasingly dysfunctional world." A Clarence House spokesman said: "We would never comment on the content of what is a private meeting and in terms of changes to succession laws, that is a matter for the Government."