This week's You ask, they answer guest is on a mission to answer a recurring dilemma: how do you ensure fashion is fair as well as on-trend? Known as the Ethical Trading Initiative (ETI), it's an alliance of high street names, NGOs and unions that aims to create, in its own words, "a world where all workers are free from exploitation and discrimination, and work in conditions of freedom, security and equity".

The ETI's members range from Tesco to Primark, although this year Boots dropped out of the initiative and some big firms – such as BHS and Topshop – are not in the alliance. It has also not stopped its members running into ethical scandals, with Primark having to remove ethical branding from its tills and website earlier this year when it was accused of paying illegal immigrants less than the minimum wage.

Monday to Friday this week is your chance to quiz the ETI on everything from fair trade and workers' rights, to supply chains and ethical consumerism. Want to know if sweatshops are on the rise or on the decline? What effect the recession has had on ethical pledges? Or do you have a comment about what issues and companies you'd like the initiative to tackle next?

Just post your questions for the ETI below.