i want to do mba in marketing. i am confused between-
1) Bangor University
2) Coventry University, London
3) University of Greenwich
4) University of Bedfordshire
which among these will be best for marketing.

I don't think any of these will be good. I guess the least bad will be Coventry.

thank u duncan but bangor university marketing mba is accredited by charted institute of marketing.is this accreditation good?

The Bangor website advertises the CIM's old dual award scheme, which no longer exists http://www.cim.co.uk/tandq/partnerships/dual/dualawards.aspx

The highest CIM qualification is a qualification that allows you to enter into an MBA, and is typically integrated into undergraduate programmes not MBAs. If you want to work in marketing, why take an MBA without meaningful international accreditations for which the *home* fee is 18,000 pounds when an accredited MBA or MSc in marketing can be found for less at top business schools: http://www.mastersportal.eu/students/search-results/?params=ZZBrjoMwDITv4hMk0Ac1h6myYCGLklSJ2RVC3H0d0qqL9l8cfzNj26GtcE14Q4g0cPB37qFltG3CC0KIPLAHLWoEIpdfDcJIy0-IfcqlKicXRxL2Q67t-dO_SxjJK-bQ4spo_vGbCk5_BEloOvKXN7_DV4Sehkh0hHS6KXXFzijCqePngz3lXaq6Ld9dmL3E5bVinYXWIiSZ-0WTXZRsanDNNhWCewhF74S_S1zp6Agys-itirkxu5GOkOavY3LTtNsvza12e48f1&start=0&length=10&order_by=tuition_eea&order_direction=desc

I think an MBA should cover all aspects of business management, and not just marketing. If you want to study marketing, do a marketing degree.

All these universities have no value either in the UK or in any other country. If you want to do Marketing, go for a reputed MSc program in Marketing than MBA from any other the above mentioned universities.
Mamit