Domain names ending in .co.uk, .org.uk, .me.uk, .ltd.uk, .plc.uk and .net.uk are eligible, subject to the below criteria.
If your domain was registered before 23:59hrs on 28 October 2013 you will have the rights to the equivalent .uk domain, providing there was no other corresponding .co.uk, .org.uk, me.uk, .ltd.uk, .plc.uk or .net.uk registered.
If there is a situation where there are two or more domains with the same website name, the .co.uk will be offered the .uk equivalent. Where there is no .co.uk, the .org.uk will be offered the .uk equivalent. Where there is no .co.uk or .org.uk the .me.uk will be offered the .uk equivalent.
Where a .co.uk domain has been registered after 28 October 2013 and before launch on 10 June 2014 the co.uk domain holder will also have rights to the .uk equivalent, as long as there is no 'clash' with any existing domains meeting the criteria above.
The current domains that are not eligible for this process are .sch.uk and those not managed by Nominet, such as .ac.uk, .mod.uk, and so on.