The FTSE 100 opened tentatively higher after inflation came in little changed for May at 3.4%, from 3.5% in April.
An hour into trading, the blue chip index was up 20 points at 8,850 - a gain of about a fifth of a percent.
Entain is the top riser, which seems to be on the back of a positive note from Deutsche Bank.
Aerospace group Melrose, accountancy software developer Sage Group, defence contractor Babcock, insurer Aviva and lender Barclays are among the top risers.
In company news, Speedy Hire PLC (LSE:SDY) has turned in final results showing lower sales and a swing to statutory losses, but said it "remains committed" to delivering its growth strategy through further investment in its fleet and transforming the business.
Shares in AO World PLC (LSE:AO.) ticked up after the online electricals retailer posted full-year results showing a notable improvement in profitability and a continued recovery in margins.
PZ Cussons (LSE:PZC), the maker of Imperial Leather and Carex soaps, has agreed to sell its half of a Nigerian edible oils joint venture as it continues to review strategic options for its African businesses.