UK stocks were little changed on Wednesday morning as investors braced for central bank decisions on interest rates due in the US and Europe this week.
At 0855, the benchmark FTSE 100 index was down 2.40 points at 7,498.01.
Security company Serco Group jumped 13% after it announced its annual profit would hit the top end of previous guidance, while forecasting further profit growth in 2018 and 2019.
Dixons Carphone rallied 8.4% after the phone and electronics retailer maintained its full-year guidance and pledged to keep its final dividend intact, despite a sharp fall in first-half profit.
Improved holiday booking volumes, meanwhile, helped travel company TUI Group comfortably meet its full-year earnings guidance. Its shares gained 2.2%.
Also on the winning side was small foam specialist Zotefoams, which sprung 15% higher on the back of a new partnership deal with Nike.
Oilfield services company John Wood Group shed 0.7% after announcing that it expected to report pro-forma annual earnings of up to $600m following its recent acquisition of Amec Foster Wheeler.
A big loser this morning was window and door provider Safestyle UK. Its shares tumbled 19% after it downgraded its profit guidance for 2017 and 2018 amid weakening demand.
Plastics company Essentra, meanwhile, said it had acquired Arkansas-based Micro Plastics, for an undisclosed sum. Its shares gained 0.6%.
Carillion tacked on 1.4% after the facilities management and construction group concluded a £47.7m sale of its UK healthcare arm to Serco.
Metals Exploration fell 4% after announcing that it had encountered technical disruptions at its Runruno gold operation in the Philippines.