Reform UK's Richard Tice makes announcement about Metro Bank decision

The video discusses a scenario where a bank manager deals with a fast-growing tech customer, Reform UK, during a pandemic. Despite challenges, the customer has big plans, including a general election. The bank, Metro Bank, should be reassured by the customer's regulation and leadership. The video questions why a bank would terminate such a promising relationship.

In what ways is the bank regulated to ensure compliance?

Why might it seem odd for a bank to terminate a relationship with a successful customer?