Royal Dutch Shell plc (ENXTAM:RDSA) is planning to sell off UK oil assets are expected to move ahead within weeks, ahead of an M&A boom for the North Sea. City sources have said that private-equity backed investment funds are expected to close in on asset sales from Shell as well as Engie amid rising investor confidence in the oil market recovery. Shell is under pressure to sell $30 billion worth of assets from its global portfolio after its takeover of BG Group while Engie, formerly GDF Suez, is steadily shifting away from capital-intensive high-carbon energy towards renewable power.