There are varying styles of Sri Lankan wedding and these change in accordance with the region. The core elements involve Kandy Dancers and Drummers, exchanging of vows upon a wedding Poruwa (stage) and elaborately dressed elephants to bring in the groom or to carry the just-married couple.
Many hotels will offer other attractive touches: champagne, a wedding cake, artistically arranged Sri Lankan buffets, traditional Kandyan dress and tailor-made saris. The cake styles and table decorations might not be to the British taste so ensure that the hotel have what you desire in mind. They are very creative if guided – perhaps take some magazine references.