(1)    After section 31 of the Taxes Act 1988 (Schedule A deductions and allowances: provisions supplementary to sections 25 to 30) insert—

(1)    This section applies to a Schedule A business if the land mentioned in paragraph 1(1) of Schedule A consists of or includes a dwelling-house.

(2)    In computing for the purposes of income tax the profits of a Schedule A business to which this section applies, a deduction shall be allowed in respect of any expenditure to which subsection (3) applies.

That is subject to any provision of regulations under subsection (13).

(3)    This subsection applies to expenditure as respects which the numbered conditions set out in the following provisions of this section (“the qualifying conditions”) are satisfied.

(4)    Condition 1 is that the expenditure is incurred in the provision of a qualifying energy-saving item in the dwelling-house.

(5)    Condition 2 is that the expenditure is incurred on or after 6th April 2004 but before 6th April 2009.

(6)    Condition 3 is that the expenditure is incurred wholly and exclusively for the purposes of the Schedule A business.

(7)    Condition 4 is that the expenditure is capital expenditure.

(8)    Condition 5 is that, apart from this section, the expenditure is not deductible in computing the profits of the Schedule A business.

(9)    Condition 6 is that no allowance under the Capital Allowances Act may be claimed in respect of the expenditure.

(10)    Condition 7 is that the expenditure is not incurred in respect of the provision of an item in a dwelling-house which, at the time when the item is installed,—

(a)    is in the course of construction, or

(b)    is comprised in land in which the person claiming the deduction under this section does not have an interest or is in the course of acquiring an interest or further interest.

(11)    Condition 8 is that for the purposes of section 503 (letting of furnished holiday accommodation to be treated as a trade for certain purposes) either—

(a)    the Schedule A business does not consist to any extent in the commercial letting of furnished holiday accommodation, or

(b)    if it does so consist to any extent, the dwelling-house does not constitute any or all of the furnished holiday accommodation in question.

(12)    Condition 9 is that the income of the person claiming the deduction is not computed in accordance with paragraph 9 or 11 of Schedule 10 to the Finance (No 2) Act 1992 (furnished accommodation) in respect of any qualifying residence which consists of or includes the dwelling-house.

(13)    The Treasury may by regulations make provision for any of the following purposes—

(a)    restricting or reducing the amount of expenditure in respect of which deductions may be claimed under this section;

(b)    excluding entitlement to a deduction under this section in such cases as may be specified in, or determined in accordance with, the regulations;

(c)    determining which of two or more persons is (and which is not) entitled to a deduction under this section in cases where different persons have different interests in land consisting of or including the whole or part of a building containing one or more dwelling-houses;

(d)    making apportionments (including apportioning amounts to companies which are not entitled to a deduction under this section) in cases where—

(i)    a Schedule A business is carried on by two or more persons in partnership, or

(ii)    an interest in land is beneficially owned by two or more persons jointly or in common.

(14)    Section 31B supplements this section.

(1)    This section has effect for the purpose of supplementing section 31A and shall be construed as one with that section.

(2)    Section 31A does not have effect for the purposes of corporation tax.

(3)    No deduction may be made under section 31A unless a claim is made.

(4)    Where, on a just and reasonable apportionment of any expenditure, the qualifying conditions—

(a)    would be satisfied as respects some part or parts of the expenditure, but

(b)    would not be satisfied as respects the remainder of the expenditure,

a deduction under section 31A shall be allowed in respect of the part or parts mentioned in paragraph (a) but not in respect of the remainder.

Any such deduction is subject to, and must be in accordance with, the other provisions of this section and regulations under section 31A(13).

(5)    Expenditure incurred by a person—

(a)    for the purposes of a Schedule A business, but

(b)    before the time when he begins to carry on that business,

is not deductible under section 31A by virtue of section 401 (relief for pre-trading expenditure) unless the expenditure is incurred not more than 6 months before that time (and on or after 6th April 2004).

The reference to section 401 is a reference to that section as it applies for the purposes of Schedule A in relation to a Schedule A business by virtue of section 21B.

(6)    “Qualifying energy-saving items” are items of any of the following descriptions—

(a)    cavity wall insulation;

(b)    loft insulation.

(7)    The Treasury may by regulations amend subsection (6)—

(a)    by adding further descriptions of items; or

(b)    by removing or varying descriptions of items.

(8)    The Treasury may by regulations provide that an item is to be regarded as an item of any particular description in subsection (6) only if it satisfies such conditions as may be specified in, or determined in accordance with, the regulations.

(9)    The conditions that may be imposed by regulations under subsection (8) include conditions imposed by reference to information or documents issued by any body, person or organisation.

(10)    The provision that may be made by regulations under this section or section 31A which are made on or before 31st December 2004 includes provision—

(a)    having effect before the date on which the regulations are made, or

(b)    having effect in relation to expenditure incurred before that date.

(11)    Any reference to the provision of a qualifying energy-saving item is a reference to the acquisition of such an item and its installation in the dwelling-house.” .

(2)    The amendment made by this section has effect in relation to expenditure incurred on or after 6th April 2004 but before 6th April 2009.