The finance team manages the internal finances of the firm. They are the firm's internal management accountants.
Their roles include:
Working in the financial team at a company you can reasonably expect to receive training that will lead you onto an appropriate accounting qualification, such as ACCA or CIMA.
Generally speaking, it is not possible to study for ICAEW ACA through this route, as typically this requires work experience at a accounting firm such as PwC.
The department may also include some non-accounting roles such as Treasury or Project based roles.