(For a Reuters live blog on U.S., UK and European stock markets, click LIVE/ or type LIVE/ in a news window) * FTSE 100 up 0.1%, FTSE 250 adds 0.3% Aug 25 (Reuters) - London’s FTSE 100 rose slightly on Wednesday, led by healthcare and consumer staple stocks, as investors took a breather to assess risks from rising COVID-19 infections worldwide and concerns about easing global economic growth. The blue-chip FTSE 100 inched 0.1% higher, up for a fourth straight session, with AstraZeneca, Reckitt Benckiser and Diageo among the top boosts. The domestically focussed mid-cap index gained 0.3% to a record 23,964.03 with homebuilder stocks leading the rise. Waste management firm Augean surged 16.7% after it said it agreed to a buyout offer of 341 million pounds ($468 million) from a group affiliated to London-based investment manager Ancala Partners LLP. British subprime lender Amigo dropped 4.5% after it said its losses increased substantially in the last financial year. (Reporting by Shashank Nayar in Bengaluru; Editing by Subhranshu Sahu) Our Standards: The Thomson Reuters Trust Principles.