Enquiry- LSE Postgraduate

-Does LSE only accept candidates with 1st class ? No, if they say that they take 2.1's for your course, then they should be fine with that grade
-Does LSE accept candidates from a lower tier UK university? I wouldn't class my former uni as a 'prestigious' uni at all, so whilst I think they do take it into consideration, it isn't a large criteria for them
-Does my background suitable to apply for this course? I can't see why not, so long as you can explain how both your undergrad and work experience tie into this masters, and with your future career/academic development
-With my average result from a low ranking university should I try to apply this course? or should I apply for other universities in the UK? I think it would be wise to research more universities and apply to those too, especially as some universities don't have an application fee either, so there's nothing to lose. I do think that LSE's application fee is pretty steep, but if you are seriously considering LSE and really try to write a great personal statement (and apply early!!), then you should have a fair shot at getting an offer.