William Portrait - £100,000

The only life portrait of Prince William is to go on sale this week. The rare study of the second-in-line to the throne when he was 17 was painted by artist John Wonnacott in preparation for a group picture of the royal family to celebrate the late Queen Mother's 100th birthday. It will be put on public display for the first time on Wednesday at Agnew's gallery in Mayfair, London. Two pictures of the Queen Mother and one of the six royals in the final image - the Queen, the Queen Mother, the Duke of Edinburgh, the Prince of Wales and Princes William and Harry - will also be available for collectors to buy. The rare portraits are expected to fetch around £100,000 each. For the full story - click the title Irish Art