The London stock market went up in early trade on Friday with the FTSE 100 index gaining by 18.53 points, or 0.36 percent, to 5,213.70 points at around 08:30 local times. Shares in BSS Group increased by 34.58 percent soon after opening, the biggest riser, and shares in Travis Perking also gained by more than 6 percent. Meanwhile, shares in Forth Ports declined by 12.24 percent, the biggest loser in early trading. 