F + (A x T)

where—

F

is the flat rate liability applicable to the non-resident parent;

A

is the amount of the non-resident parent’s gross weekly income between £100 and £200; and

T

is the percentage determined in accordance with the following Table—

Number of relevant other children of the non-resident parent

T (%)

1 qualifying child of the non-resident parent

0

19

1

16.4

2

15.6

3 or more

15.2

2 qualifying children of the non-resident parent

0

27

1

23.5

2

22.5

3 or more

21.9

3 or more qualifying children of the non-resident parent

0

33

1

28.8

2

27.7

3 or more

26.9.