Uncertainty over A380 engines triggered the slipping of engine maker Rolls Royce shares and the Britain's top shares were pulled down as the investors gained heavily from previous session.
By the 0908 GMT, FTSE 100 slipped by 19.32 points to reach at 5,855.87 but closed at 5,875.19 by gaining 0.4 percent. On Tuesday it just managed to cross 5,900 levels for the very first time since June 6, 2008.
Shares of the Randgold Resources, the Gold miner, jumped sharply after announcing of its third quarter budget but again fell by 2.4 percent later.
The shares of BP also lost 1.2 percent.