Opinion of the Economic and Social Committee on: - the 'Proposal for a Council Directive on the extension of Council Directive 97/81/EC of 15 December 1997, on the Framework Agreement on part-time work concluded by UNICE, CEEP and the ETUC, to the United Kingdom of Great Britain and Northern Ireland', and - the 'Proposal for a Council Directive on the extension of Council Directive 97/80/EC of 15 December 1997, on the burden of proof in cases of discrimination based on sex to the United Kingdom of Great Britain and Northern Ireland'