4Without prejudice to the following provisions of this Schedule, any development losses which have accrued to a person in any chargeable period shall under section 176 or, as the case may be, section 179 of the Taxes Act be deducted from or set off against—
(a)first, any development gains accruing to him in that period ;
(b)secondly, any other profits or gains or income arising from transactions in respect of which he is assessed for that period under Case VI of Schedule D ;
(c)thirdly, any development gains accruing to him in the first subsequent chargeable period;
(d)fourthly, any other profits or gains or income arising from transactions in respect of which he is assessed for the last-mentioned chargeable period under that Case,
and so on for each successive chargeable period.