Liberal Democrat Conference wraps up today in Brighton. It could well be the happiest conference we visit this season with the party riding high after winning 72 seats at the election. The challenge that they face now is improving on that number, providing some opposition to the Labour party and protecting their new Surrey MPs once the new Tory leader is decided. We have heard Ed Davey speak passionately on social care, but can they carve a distinct position on other big policy issues, such as Europe? Or the NHS?  Katy Balls speaks to James Heale and Stephen Bush, associate editor of the Financial Times.