Before coming to UK make sure you college is genuine. The list of genuine colleges are given in this link . 

http://www.ukba.homeoffice.gov.uk/sitecontent/documents/employersandsponsors/pointsbasedsystem/registerofsponsorseducation

I saw the website of Farnborough tech it seems nice college. In the present context i believe it is much better to study in this college than in London. London seems over crowded by Nepalese student now. And difficult to find part time jobs.  Furthermore, my first impression of this farnborough tech is very nice.