In 2012 Anoine Cahuzac left HSBC and joined EDF (Électricité de France).
In March 2014 it was announced that HSBC were advising on the Hinkley Point C nuclear power station.
And the appointment of EDF to build the plant was formally announced in October 2015.
Amber Rudd was Secretary of State for Energy and Climate Change from May 2015 having previously been Parliamentary Private Secretary for George Osborne, at the time he was pleading with the US Justice Department not to prosecute HSBC for laundering money for terrorists and drug cartels.
It’s probably also worth pointing out that HSBC are Finsbury’s bankers.