Trócaire has said that consumers should ask retailers tough questions about how in inexpensive clothes are sourced.

The charity was commenting on a report that three factories in India which supply clothing retailer Penney's were using child labour.

The BBC Panorama documentary found that t-shirts sold in the Penney's chain of stores were finished by child workers paid just 76c a day.

Primark, which trades as Penneys in Ireland, says that it investigated the allegations immediately, and that the three factories concerned had subcontracted out the work without its knowledge.

The company says that it will no longer buy goods from the factories concerned.

Primark has built up a business valued €6.3 billion based on fashionable clothes low prices.