Hello Richard,
BPO industry is thriving in Sri Lanka as for many reasons such as availability of skilled/ suitable labour, suitable telecom infrastructure plus government incentives and encouragement and other support services for same. However, firstly as a BPO/ corporate consulting expert, I would suggest you could apply and obtain Board of Investment (BOI) approval for such project/ business which you as a business entity could gain immense tax breaks and corporate incentives as for your foreign direct investment; which would be no doubt a boost not only for your investment but also on a business view; in setting up and on a long term corporate perspective.
If you need to go in to details or further assistance, feel free to get in touch with me, would be happy to guide you through on same.
Best regards,
Sean