Campaign starts to improve standards in country gaining reputation as ethical source of clothing.

It has been a month since a garment factory collapsed in Bangladesh, killing more than 1,000 people.

The disaster has prompted calls for better regulation of the industry in the region.

Sri Lanka, a neighbour of Bangladesh, is one country gaining a reputation as an ethical source of clothing, putting pressure on manufacturers to improve safety standards and workers' rights.

The "Garments without guilt" campaign covers production, working conditions, child labour, forced labour and sweatshop practices.