DNS Issues are continuing today. Over 84 issues were reported in several areas in the UK. Problems such as not being able to access your own website or eBay stores. BT are working on this problem to rectify these outages. Rest assured not the whole country is affected so many buyers will continue to purchase from your sites without any issues.
Please check:
http://btbusiness.custhelp.com/app/service_status/?s_cid=btb_FURL_business/help/servicestatus
and
http://www.downdetector.co.uk/problems/bt-british-telecom