The FTSE 100 edged down 1.43 points to 7,642 on Thursday morning after sterling's gains and a mixed performance on Wall Street overnight dragged on the market.
Restaurant Group (RTN) added 2.2% to 270.2p despite a 3% fall in like-for-like sales in 2017, with the group saying it expects to deliver pre-tax profit in line with current market expectations.
Greene King (GNK) slipped 0.8% to 522.7p, with news of a record-breaking Christmas Day being outweighed by slower sales either side of the two Christmas weeks. Sales for the 13 weeks to 14 January were down 1.4%.
Sky (SKY) gained 0.5% to 1,029p after announcing group revenue grew by £296 million, or 5% to £6,737 million in the six month to 31 December 2017.
Kier (KIE) said it remains on track to deliver double digit profit growth after trading in line with management's expectations in the six months to the end of December. The shares surged 9.2% to 1,046p.
Great Portland Estates (GPE) added 3% to 668p on news it plans to return £306m to shareholders following profitable property sales.