Management/consulting charging to related company

My client has 2 limited companies A & B, A is supporting B by loaning it money every month. They are not in related fields and the Director is paid through payroll (minimum salary) through company A. B needs to be showing an increased income so would it be possible for B to charge A management or consultancy fees in a similar amount to the current loan.

The purpose of this is not to have a tax advantage but a slight one might be gained in the short term as B does have some losses but not considerable losses to offset.