Shares in Barclays fell 0.9% after the US Department of Justice sued the bank for alleged mortgage securities fraud.
It says Barclays misled investors about the quality of loans backing securities in the run-up to the financial crisis. Barclays has rejected the claims
Data showed the UK economy grew faster than estimated in the third quarter.
The Office for National Statistics (ONS) said the economy grew by 0.6% in the July-to-September quarter, compared with the previous estimate of 0.5%.
However, the ONS also trimmed its growth estimates for the first and second quarters of the year.
On the currency markets, the pound fell 0.2% against the dollar to $1.2258, and slid 0.4% against the euro to â‚¬1.1725.

The woman, believed to be Lithuanian, was struck by a car on the A38 near Burton-upon-Trent around 20:30 BST on 6 July after leaving the man's vehicle.
Johnathon Allison, of Colman Street, Hull, has also been arrested on suspicion of murder.
Mr Allison was remanded in custody at Cannock Magistrates' Court on 8 July.
See more stories from Stoke and Staffordshire here
Staffordshire Police said Mr Allison has been released under investigation in connection with the murder probe.
He will next appear at Stafford Crown Court on 11 August.
Police said the woman left the vehicle as it pulled into a layby, and was hit at "high speed" by an oncoming car.
She was airlifted to hospital in cardiac arrest with head, chest and pelvic injuries, but later died.
Police are now working with authorities in Lithuania to confirm the identity of the woman.

They are the first duo to host the Saturday night show; they replace Dermot O'Leary who announced he was leaving last month after eight years.
The pair previously co-hosted the spin-off show The Xtra Factor on ITV2 for two years from 2011.
Murs was a contestant on the show in 2009, when he was runner-up to Joe McElderry.
Since then he has gone on to sell 13 million records in five years.
Flack has also found further fame after winning last year's Strictly Come Dancing.
Murs said he was "incredibly excited and proud" to be returning to The X Factor alongside Flack.
"I love the show and it kick-started my career in music which has given me the opportunity to do what I love. I already have the best job in the world and it's about to get better -  I can't wait to get started and be part of finding some amazing new talent," he said.
Flack said she was "beyond excited" about presenting the show with him.
"To have the privilege of doing this with someone who makes me laugh out loud is a massive bonus," she said.
"I'm also incredibly lucky to have the best tips and support from my showbiz big brother Dermot.  I'm not sure how I can live up to his long-term residency but I know I can't let him down!"
X Factor boss Simon Cowell said he was "absolutely delighted" that they were returning to the show.
"When they were on Xtra together, they were a brilliant double act. Since then, Caroline's gone from strength to strength - and Olly has become one of Britain's biggest stars. So now I'm looking forward to them fronting the main show."
The new series of The X Factor returns to ITV in the autumn and open auditions are currently under way.
UK shares edged higher in the final trading session before Christmas, with the FTSE 100 ending a shortened session up 4.49 points at 7,068.17.
[NEXT_CONCEPT]
A man has appeared in court charged with breaching a restraining order following the death of a woman on a dual carriageway.
[NEXT_CONCEPT]
Olly Murs and Caroline Flack have been confirmed as the new presenters of The X Factor.