The standard limiation period is 6 years. So why are human rights act breaches - supposedly more serious than other matters - confined to one year?
Because HRA1998 says so, but it's not an absolute limit and is subject to discretion by the court:
(1)A person who claims that a public authority has acted (or proposes to act) in a way which is made unlawful by section 6(1) may—
(a)bring proceedings against the authority under this Act in the appropriate court or tribunal, or (b)rely on the Convention right or rights concerned in any legal proceedings,but only if he is (or would be) a victim of the unlawful act.
(5)Proceedings under subsection (1)(a) must be brought before the end of—
(a)the period of one year beginning with the date on which the act complained of took place; or
(b)such longer period as the court or tribunal considers equitable having regard to all the circumstances,but that is subject to any rule imposing a stricter time limit in relation to the procedure in question.