I like the name
Someone else has the singular version while you have the plural. All I foresee is confusion and potential legal issues. Furthermore, if you built your market first, I believe a significant number of potential customers would type the singular, ukwebhost.com, and you would be building a business for someone else. They pronounce the same, so very hard to differentiate.
Therefore, if I were you, I would either try to purchase the other one as well, or drop the idea of developing ukwebhosts.com