London’s blue-chip index was in the green on Tuesday, with investors buoyed on indications that the US and China are making progress with trade talks.
Oil prices were also lifted on expectations of a US-China trade deal, with a barrel of Brent crude trading up 1.37% at 60.58 US dollars (£48.39).
Meanwhile, the pound slipped on news that Prime Minister Theresa May could face a vote of no confidence.
The pound was down 0.5% against the US dollar at 1.249, having fallen to its lowest level since April 2017 on Monday when a key parliamentary vote on the EU withdrawal agreement was deferred. Sterling was flat versus the euro at 1.105.
In corporate news, WPP is axing 3,500 jobs worldwide under plans to slash costs by £275 million a year as it looks to turn around its fortunes.
The move will largely affect administration roles as the advertising giant looks to merge 100 offices and shut a further 80 sites.
WPP shares closed up 39p to 844p.
Equipment rental company Ashtead said it expects to beat its full-year targets after positive growth in the US during the first half.
Rental revenue was up 18% to £2.07 billion, while underlying pre-tax profits jumped 19% to £633 million.
Ashtead shares rose 57.50p to 1,664p.
Shares in troubled retailer Carpetright rose 0.95p, nearly 6%, to 17.3p despite unveiling stinging losses for a period in which it underwent a dramatic store closure programme.
For the 26 weeks to October 27, the group made a loss before tax of £11.7 million.
Underlying earnings swung to a loss of £1.7 million compared with a profit of £8.6 million this time last year.
The biggest fallers on the FTSE 100 were Standard Life Aberdeen down 4.35p to 224.85p, Randgold Resources down 114p to 6,906p, Lloyds Banking Group down 0.56p to 52.33p, and RSA Insurance Group down 3.4p to 499p.cap