Hi, how are you?
I currently have a web site domain.com. This is my primary site. i want to get search results in the uk and i am considering purchasing a domain.co.uk. This will be an empty site which will 301 the user to the primary domain.com
Is this bad for SEO?
Also, are there better ways of implementing such features?
Thanks in advance
That is a classic Doorway page and yes, it will probably hurt your ranking on the domain.com, Google doesn't like that very much, it's not black hat SEO, but it is Gray hat SEO for sure.
What other options do you have? Not sure, maybe create a website that resembles the domain.com but try not to post duplicate content.
From the SitePoint FAQ on Search Engine Optimisation.
How do improve my rankings for country specific search?
To rank better in country specific search you should:
1) Use the country specific TLD
2) Host the site in that country
3) Set the geographic location for the site in Google Webmaster Tools