I own a LTD company in the UK, it is a 4 letter name and I own the .co.uk and .ltd.uk for it. I have owned both for a year and a half which is how long the company has been running. To secure my company do I need to TM it? I have checked on IPO and it is not trademarked currently. What stops someone buying the .com of the company name, registering a business as **** something or other LTD, and then claiming that my domains belong to them? For the sake of £170 is it worth trademarking? Does anyone know how much more it costs to protect it internationally as well as just the EU? Thanks!