can anyone help me to find is the best university in UK for MBA ,with out work experience,i have also got offers from
coventry univ
wales newport
sunderland univ
bedfordshire univ for MBA

You might be better off taking an MSc in management and then coming back to go an MBA at a better school which requires work experience.

For a good ranking of pre-experience UK business schools, look at:
http://www.guardian.co.uk/education/table/2011/may/17/university-guide-business-management-studies

On that ranking, Sunderland and Coventry are the ones to focus on. I think the employment situation will be much better in Coventry.