The Housing Benefit (Persons who have attained the qualifying age for state pension credit) Regulations 2006

10.  The assets of any business owned in whole or in part by the claimant if—

(a) he is not engaged as a self-employed earner in that business by reason of some disease or bodily or mental disablement; but

(b) he intends to become engaged (or, as the case may be, re-engaged) as a self-employed earner in that business as soon as he recovers or is able to become engaged, or re-engaged, in that business,

for a period of 26 weeks from the date on which the claim for housing benefit is made or, if it is unreasonable to expect him to become engaged or re-engaged in that business within that period, for such longer period as is reasonable in the circumstances to enable him to become so engaged or re-engaged.