In early trading the FTSE 100 is up 0.4% to 7,410.90 after gains overnight in Asia.
Free-to-air broadcaster ITV (ITV) gains 1.5% to 177.7p as it nabs EasyJet (EZJ) chief executive Carolyn McCall. The low-cost airline, where McCall has been at the helm for seven years, is down 0.7% to £14.01. McCall will take up her new role in January 2018.
Glasgow engineering firm Weir (WEIR) is up 6.7% to £19.47 as it says full year revenue and operating profit in its oil and gas business will be at the upper end of analysts' estimates after a recovery in North American markets.
Centrica will own 69% and Bayerngas Norge's existing shareholders, led by SWM and Bayerngas GmbH, will own 31%.
The gas-focused venture will comprise Centrica's assets in the UK, Netherlands and Norway and Bayerngas Norge's assets in the UK, Norway and Denmark. Centrica ticks up 0.5% to 207.3p on the news.
Construction services business Carillion (CLLN) is appointing accountancy firm EY to support a strategic review after a major profit warning rocked its share price last week. The shares are up 4.7% to 58.8p but still down substantially on the 190.1p they traded at before the warning.