U.K. stocks advanced in line with international markets as the FTSE 100 Index resumed trading after the Christmas holiday.
AstraZeneca Plc contributed the most to gains with a 1.9 percent advance. Hikma Pharmaceuticals Plc rose 4.8 percent, for the biggest increase on the index.
Anglo American Plc led a gauge of U.K. miners lower, falling 6.3 percent. Energy stocks were little changed after an earlier drop, with BP Plc losing 1.4 percent, while BG Group Plc added 1.9 percent.
The FTSE 100 rose 1 percent to 6,314.57 at the close of trading in London, for its fourth consecutive session of gains. The equity benchmark is still heading for a 0.7 percent monthly decline, extending its annual loss to 3.8 percent.