(Reuters) – The UK equity market came under selling pressure on Thursday, with shares in IG Group and Wizz Air tumbling after underwhelming results, while Elementis jumped on report of a potential bid for the chemicals maker. The blue-chip FTSE 100 was down 0.2%, as of 0824 GMT, while the domestically focussed FTSE 250 fell 0.3%. Both the indexes closed on Wednesday at their highest levels in more than a week, bolstered by China-exposed stocks after officials announced support measures to restore confidence in the economy and markets. IG Group tumbled 9.3%, by the most since March 2023, after …