(Recasts with analyst comment, updates prices, changes dateline

to London)

By Polina Devitt

LONDON, Jan 31 (Reuters) - Aluminium and copper prices

fell in London on Friday under pressure from a stronger dollar

as global markets braced for the threat of U.S. tariffs on

Canada and Mexico as early as Saturday.

Three-month copper on the London Metal Exchange

(LME) was down 0.8% at $9,055.50 a metric ton by 1106 GMT while

aluminium lost 1.1% to $2,598.

LME copper was on track for a 2.4% fall this week, its worst

week in two-and-a-half months, but remained set to register its

first monthly growth since September with a 3.3% gain in

January.

"One down and 11 to go. January 2025 has reminded us of the

choppy nature the opening month of the year often brings," said

Alastair Munro at broker Marex.

U.S. President Donald Trump on Thursday reiterated his

threat of 25% duties on imports from Canada and Mexico. That

helped to lift the U.S. currency, making dollar-priced

metals more expensive for buyers holding other currencies. It

also inflated overall uncertainty driving more investors towards

safe-haven assets.

"The reality is that most fund interest lies in other

commodity spaces, such as energy, precious (metals) and

agriculture where they see a clearer picture. Our space is

therefore more dominated by higher-frequency types," Munro said.

Industrial metals were also affected by recent concern over

global economic growth, with U.S. inflation data on Friday

expected to provide clues on the interest rate outlook.

The U.S. Federal Reserve held rates steady on Wednesday,

adding that there would be no rush to cut them again until

inflation and jobs data made it appropriate.

In other metals, LME zinc fell 0.9% to $2,767.50 a

ton, lead shed 0.7% to $1,953, tin eased 0.6% to

$30,055 and nickel was down 0.9% at $15,255.

The main markets in top metals consumer China are closed for

the Lunar New Year holiday until Feb. 5.