I am trying to register a domain name for a company website and am a bit confused about the process. Searching on google brings up loads of sites offering this service with a huge range in prices, from £2.99 onwards. Whats the difference in each and are they all genuine? ie will I find in a few months or so that I dont actually own the domain name and someone else has nicked it?

Any advice much appreciated.
Ps Any advice on building a website would also be great. This is my first time building a site.

moved to web design forum.

You wont find someone will have nicked it if you use a reputable supplier. However you normally have to renew each year or so.

I registered mine with telivo. I think I paid about £15 for 2 years.