By Elliot Gulliver-Needham Rathbones Group’s underlying profit before tax skyrocketed 120 per cent in the first half of the year, as the group ran well ahead of targets following its merger with Investec Wealth & Investment. Profit at the group jumped to £112.1m in line with expectations thanks in part to “synergy realisation” between the two companies, CEO Paul Stockton said in its interim results today. “We have achieved synergy realisation ahead of target, with run-rate synergies of £20m delivered to the end of June 2024, well ahead of our year one post-combination objective of £15m,” Stock…