Public Interest Litigation travels to United Kingdom.
Public Interest Litigation is a creation of Supreme Court of India which in 1970’s taking notice of various wrongs, especially the matters of illegal detention of prisoners in prisons in all over India. Later the Public Interest Litigation expanded to all other aspects of administration as well which hitherto-before were the matters in the exclusive domains of executive of Indian Government. It appears the erstwhile colonial masters could not resist the temptation of Public Interest Litigation, as well.
Public Interest Litigation, is a relaxation of rule of Locus Standi where by,
the absence of personal interest by the petitioner is over looked by Court.
It would, in my view, be a grave lacuna in our system of public law if a pressure group, like the federation, or even a public spirited taxpayer, were prevented by outdated technical rules of locus standi from bringing the matter to the attention of the court to vindicate the rule of law and get the unlawful conduct stopped. The Attorney General, although he occasionally applies for prerogative orders against public authorities that do not form part of central government, in practice never does so against government departments. It is not, in my view, a sufficient “answer to say that judicial review of the actions of officers or departments of central government is unnecessary because they are accountable to Parliament for the way in which they accountable to Parliament for the way in which they carry out their functions. They are accountable to Parliament for what they do so far as regards efficiency and policy, and of that Parliament is the only judge; they are responsible to a court of justice for the lawfulness of what they do, and of that the court is the only judge.
[Source: R v Inland Revenue Commissioners, ex parte National Federation of Self Employed and Small Businesses Ltd  AC 617 (by Lord Diplock at 644E G,)]
“The first stage test, which is applied upon the application for leave, will lead to a refusal if the applicant has no interest whatsoever and is, in truth, no more than a meddlesome busybody. If, however, the application appears to be otherwise arguable and there is no other discretionary bar, such as dilatoriness on the part of the applicant, the applicant may expect to get leave to apply, leaving the test of interest or standing to be re applied as a matter of discretion on the hearing of the substantive application. At this second stage, the strength of the applicant’s interest is one of the factors to be weighed in the balance.”
[Source: (Sir John Donaldson in R v Monopolies and Mergers Commission, ex parte Argyll Group Plc  1 WLR 763. At 773H) which was followed in R v Secretary of State for Foreign and Commonwealth Affairs, (1995) 1 WLR 386]