March 25 (Reuters) - British industrial and electronic components supplier RS Group warned on Wednesday of lower like-for-like revenue in the reporting year ending on March 31 as U.S. tariff uncertainty prompted its larger customers in Mexico to delay orders. 

The tariffs imposed by U.S. President Donald Trump last year left global companies exposed to mounting costs for most of 2025, with their impact continuing well into the new year. While the Supreme Court invalidated most of the tariffs last month, the uncertainty remains.

* Shares in RS Group, which supplies cables, protectiveequipment, and measurement tools, fell 4.8% as of 0925 GMT.   * It forecast lower second-half revenue for its Americasunit, even as it expects the EMEA and APAC regions to grow inthe period. * Mexico contributed nearly 7% of its annual revenue lastyear. * The London-based firm expects its LFL revenue to dip0.6% for the year ending March 31, from 2.90 billion pounds($3.88 billion) it made a year ago. * Analysts had expected the firm's revenue to rise to 2.92billion pounds, according to a company-compiled consensus. * RS Group, however, expects adjusted pretax profitmarginally above average market expectations of 241 millionpounds, backed by margin expansion and cost controls. * RS had already said in November that concerns over tariffsin Mexico had resulted in large customers deferring expenditure,impacting its revenues. * Business supplies distributor Bunzl earlier this month said its Mexico safety business alsologged flat sales and lower margins due to tariffs impactingbusiness confidence.

($1 = 0.7469 pounds)

(Reporting by Nithyashree R B and Prerna Bedi in Bengaluru; Editing by Sonia Cheema, Rashmi Aich and Andrei Khalip)