Jonathan Evans, Lord Evans of Weardale, ex-head of MI5 is a director of HSBC. He is also a director of Ark Data Centres, a company that supplies data services to the Cabinet Office, the Ministry of Justice the Ministry of Defence and cloud computing for BT. A previous director was Baroness E L Manningham-Buller, the previous Director General of MI5 before Jonathan Evans:
The ultimate parent company is registered in a tax haven and has the same auditors as HSBC, Price Waterhouse Coopers (from 2015 filed accounts).