A SENSATIONAL development in the Paisley by-election came last night with the announcement of the resignation of Lady Glen-Coats as chairman of the Scottish Liberal Party. In her letter of resignation to Major J Carson, organising secretary, she says of the Paisley contest: "The set-up is nothing more than a pitiful masquerade, and an outrage to the political intelligence of the people of Paisley. It deceives no-one, and is the type of political pact with which I have not the slightest intention of being associated." The resignation came following a day of rumour in Paisley, and after comment by both candidates on the decision reached the previous day by the executive of the Scottish Liberal Party to take no action one way or another in the by-election. Mr J M MacCormick, who goes forward as the National candidate with the joint support of the local Unionist and Liberal Associations, remarked that it was inevitable there should have been differences of view on a matter of such far-reaching importance.