By Kirstin Ridley LONDON (Reuters) – NatWest Group is facing a 2 million pound-plus ($2.7 million) compensation claim after a London tribunal ruled it had discriminated against an employee and unfairly dismissed her two days after cancer surgery, her lawyer said on Thursday. Adeline Willis, a 44-year-old risk and compliance officer who had worked at the state-backed bank for more than six years, said she was physically and emotionally in turmoil after being made redundant eight months after a bowel cancer diagnosis. But the tribunal ruled a recorded telephone call a few weeks after her diagnos…