Its performance boosted the benchmark index, which closed up 39.37 points or 0.62% at 6,378.04.
Oil stocks also bolstered the London market as crude and metals prices rose.
Shares in oil giants BP and Royal Dutch Shell were both up more than 1% as crude prices rose slightly on Friday after several days of declines.
Shares in Burberry continued to slide on worries over demand in Asia. Burberry's shares had dropped 8% on Thursday after it said trade in China was "increasingly challenging", and they fell a further 1.9% after German fashion house Hugo Boss said it also been affected by the slowdown in Asia.
Shares in drugmaker AstraZeneca slipped 0.6% after it said US regulators had not approved a diabetes treatment and had asked for more clinical data.
Rio Tinto shares closed 0.8% lower. Earlier on Friday, the mining giant had reported a 17% rise in iron ore shipments in the third quarter, saying it had used some of its stockpiles to meet demand.
On the currency markets, the pound dropped 0.19% against the dollar to $1.5438 and was down 0.14% against the euro at â‚¬1.3594.
(Close): Drugmaker Shire was the top gainer on the FTSE 100, rising 3.1% amid speculation that it was looking to take over US rival Radius Health.