By Sara Sjolin, MarketWatch

LONDON (MarketWatch) -- U.K. stocks moved cautiously higher on Wednesday, as investors weighed the revamped forward-guidance framework from the Bank of England and speculated when the first rate hike would come.

The FTSE 100 index was slightly higher at 6,674.60, after trading as high as 6,708.17 earlier in the day.

The main event for investors in London was the Bank of England's quarterly inflation report. The central bank revamped its forward guidance, leaving traders and economists confused about when to expect the first interest-rate hike. read: Forward Guidance 2.0: Is Carney just digging with a larger shovel?

Governor Mark Carney indicated rates could rise in the second quarter of 2015 rather than 2016 as previously forecast, but several analysts argued an increase could come before that. Nomura forecast the first rate hike to come in August, while Rob Wood, chief U.K. economist at Berenberg said the first quarter of 2015 was more likely.

"Carney's approach today was the right response to the developments in the economy, with slack materially eroding and prospects for growth improving. The first rate hike will need to come sooner than they previously thought, so they have backed away from dovish guidance," Wood said in emailed comments.

"Though, in our view, unemployment will fall faster than the Bank is expecting so the first rate hike will come sooner [than the BOE forecasts]," he added.

The central bank did address the improving labor market and said the U.K. unemployment rate has fallen much faster than expected and its 7% threshold is likely to be reached by the spring of this year.

Carney said, however, that rates will stay low well after the threshold is reached and instead the bank will consider a broad range of indicators, including the unemployment rate, business surveys and the number of hours worked.

The bank also lifted its expectations for gross-domestic-product growth in 2014 to 3.4%, from a previous estimate of 2.8%, while stressing that the U.K. recovery has gained momentum.

The pound rose after the inflation report, trading at $1.6578, up from $1.6450 late Tuesday.

In the corporate space, Wm. Morrison Supermarkets PLC rose 0.6%, after Bloomberg reported that the supermarket chain has contacted private-equity funds to potentially take the company private. A representative from Morrisons wasn't immediately available to comment.

Mining firms were also on the rise, tracking metals prices higher. The sector was boosted by upbeat trade data from China, which showed imports increased 10% in January. This indicated a pickup from December and beat analyst expectations. China is a major user of natural resources, so any signs of a rise in demand in the country tend to help metals prices and miners.

Shares of Anglo American PLC gained 1.1%, Glencore Xstrata PLC (GLCNF) rose 1.4%, and Rio Tinto PLC (RIO) added 1.4%.

More must-reads from MarketWatch:

Sold on gold: Miners signal a chance to go long

New iPhone in works; Sony involved: report

House passes clean debt-limit extension

Subscribe to WSJ: http://online.wsj.com?mod=djnwires

Rio Tinto (NYSE:RIO)
Historical Stock Chart
From Jun 2024 to Jul 2024 Click Here for more Rio Tinto Charts.
Rio Tinto (NYSE:RIO)
Historical Stock Chart
From Jul 2023 to Jul 2024 Click Here for more Rio Tinto Charts.