Specific rules apply to the registration of Domain Names in the .ltd and .plc Second Level Domains:
Unlimited companies Registered under the Companies Act, unincorporated bodies, partnerships and bodies incorporated under other legislation are not eligible for an entry in ltd.uk or plc.uk.
The only allowable characters from a Registered company name are the letters A to Z, a to z, the numbers 0 to 9 and a hyphen.
Certain words will be removed from the Registered company name where they occur at the end of the name: "limited", "public limited company" and the Welsh Language versions ("cyfyngedig" and "cwmni cyfyngedig cyhoeddus") along with the abbreviations of these words: ltd, plc, cyf and ccc
White space between words are either ignored or replaced by a single hyphen.
Company names written in a non English character set are not allowed.