Sainsbury's chief executive Mike Coupe and Asda boss Roger Burnley will face questions from MPs about Sainsbury's proposed £7. 3bn takeover of its Walmart-owned rival.
Stocks on Wall Street ended mostly higher on Tuesday as investors mulled over the US-North Korea agreement and looked ahead to the Federal Reserve policy announcement.
1700:Close Stocks dipped and the pound edged higher after the first day of the Commons debate on the proposed amendments to the Withdrawal Bill.
Tuesday appeared set to be a near mirror image of the previous session's price action, with agriculture futures bouncing back sharply alongside losses in energy futures.
Solid-state battery technology and materials innovation firm Ilika saw its shares rocket on Tuesday after receiving an offer of grant funding through the Faraday Battery Challenge Programme.
London stocks fell as traders bid the pound slightly higher ahead of the US central bank's policy decision the next day, even as they followed the latest developments in the Commons debate on the Withdrawal Bill.
Neill Ricketts, chief executive of engineering group Versarien, disposed of 403,720 ordinary shares in the AIM-quoted firm on Tuesday, lowering his stake to a total of 15. 25m shares, or 10. 26% of the company's entire issued share capital.
While Centrica shares had been in value territory for the last six months, analysts at Jefferies now see potential for "material earnings upgrades" from the British Gas owner as a result of the recent rally in energy prices and a regulatory shift.
European stocks ended on a mixed note ahead of interest rate announcements from the US central bank and European Central Bank scheduled for over the next two days and after US data showed consumer prices reached a six-year high in May.
The government made last-minute concessions with party rebels to win a key vote in parliament, but Theresa May gave private assurances that the House of Commons will be able to direct Brexit negotiations if no deal is agreed with the European Union by the end of November.
Trading on Wall Street opened on a mixed note on Tuesday as investors were left disappointed by the lack of detail in the North Korean-US agreement.
Key players from the Leave. EU platform, Arron Banks and Andy Wigmore, face a grilling from MPs on Tuesday over alleged meetings with the Russian ambassador during the campaign.
The 2018 Russia World Cup has had trouble securing sponsorship compared to other years, research has found, but Chinese firms have stepped up to help Fifa weather the storm.
Greene King will be the leisure sector's biggest winner if England do well in the FIFA World Cup while Restaurant Group and Mitchells and Butlers are likely to fare worst, according to Berenberg analysts.
Up-start equities exchange operator Aquis plans to float on London's Alternative Investment Market to strengthen its war chest, better enabling it to go head-to-head with its larger rivals, such as the London Stock Exchange and Deutsche Boerse.
Soft tissue product manufacturer Accrol Group Holdings on Tuesday became the first UK tissue converter to offer customers a plastic-free solution on all its products.
London's FTSE 250 was down 0. 3% to 21,263. 03 in afternoon trade on Tuesday, with the US-North Korea agreement and UK jobs data in focus.
London's FTSE 100 was down 0. 3% to 7,716. 25 in afternoon trade on Tuesday as investors were left disappointed by the lack of detail in the US-North Korea agreement, although UK jobs data came in pretty solid.
GlaxoSmithKline said on Tuesday that the president of its vaccines business, Luc Debruyne, will leave at the end of the year following 27 years at the pharmaceutical company.
The cost of living in the US hit a six-year high last month, pushed higher by big jumps in the prices of gasoline and medical care commodities, together with sustained strength in shelter prices.