hi
please advice
i had got visa before 3 years for 6 months for UK , but i have never traveled over there ,

i am plannig to apply now again for one year ,

its possible to get visa one year , or i have to get 6 months first ?

i am not sure if i can get visa for one year , because i have never been there ,
as i know , it must be 6 months first , and i must entry there also
then i can apply for one year

any one can advice please ?