10(1)This paragraph applies where—
(a)a limit under paragraph 9 would (apart from this paragraph) apply to campaign expenditure incurred by or on behalf of a registered party in England, Scotland, Wales or Northern Ireland (as the case may be) in relation to a period that would either be—
(i)a relevant period for the purposes of paragraph 9(3), or
(ii)a first relevant period for the purposes of paragraph 9(5); and
(b)another limit under paragraph 4, 5, 6, 7 or 8 applies to campaign expenditure incurred by or on behalf of the party in that part of the United Kingdom in relation to a period (“the other campaign period”) which is not a period during which the parliamentary general election is pending but which either—
(i)falls wholly within, or
(ii)ends at any time falling within,
the period mentioned in paragraph (a).
(2)In such a case—
(a)the limit imposed by paragraph 9 shall not apply in relation to the period mentioned in sub-paragraph (1)(a); and
(b)instead the limit imposed by this paragraph shall apply in relation to the period which is the combined period for the purposes of this paragraph.
(3)The limit applying to campaign expenditure which is incurred by or on behalf of the party during the combined period in England, Scotland, Wales or Northern Ireland (as the case may be) is the aggregate of—
(a)the limit which by virtue of paragraph 9 would (apart from this paragraph) apply to such expenditure incurred in that part of the United Kingdom during the period mentioned in sub-paragraph (1)(a); and
(b)the limit applying, by virtue of paragraph 4, 5, 6, 7 or 8 (as the case may be), to such expenditure incurred in that part of the United Kingdom during the relevant period for the purposes of that paragraph.
(4)For the purposes of this paragraph “the combined period” is the period which begins with whichever is the earlier of the following, namely—
(a)the beginning of the period which is the relevant period for the purposes of paragraph 4, 5, 6, 7 or 8 (as the case may be), and
(b)the beginning of the period mentioned in sub-paragraph (1)(a),
and ends at the end of the period mentioned in sub-paragraph (1)(a).
(5)Nothing in this paragraph affects the application of any limit imposed by virtue of paragraph 4, 5, 6, 7 or 8 in relation to any period which is a relevant period for the purposes of that paragraph.