The basic amount shall be established by:
(a) calculating the difference in the financial year, between:
- the percentage share of the United Kingdom in the sum total of the payments referred to in Article 2 (1) (c) and (d) made during the financial year, including adjustments at the uniform rate in respect of earlier financial years, and
- the percentage share of the United Kingdom in total allocated expenditure;
(b) applying the difference thus obtained to total allocated expenditure;
(c) multiplying the result by 0,66.