FTSE ticks up as banks offset weak Vodafone, oils

* Banks top-weighted gainers as FTSE gains 0.2 pct

* BAE Systems gains on Goldman note

* UK GDP contracts more than previously thought in Q3

By Dominic Lau

LONDON, Dec 23 (Reuters) - Britain's top share index inched up 0.2 percent on Tuesday, with banks offsetting losses in Vodafone (VOD.L: Quote, Profile, Research) and oil producers, though volumes were light on the last full trading day before Christmas.

The FTSE 100 .FTSE closed 6.82 points higher at 4,255.98, after rising as high as 4,307.09. The UK benchmark has fallen 34 percent this year on concerns of a deep and painful global recession, triggered by a meltdown in risky U.S. subprime mortgages.

Activity was light, with just over 578 million shares changing hands. That compared with Monday's 767 million and last week's daily average of 1.12 billion.

"Who knows what the new year holds but I think there is a bit of confidence coming back to the market," said Mark Foulds, a senior trader at ETX Capital.