I can't think of how an unaccredited 'Freshers' MBA' could improve your CV.
Try reading
Why freshers' MBAs are worse than MiM degrees from better schools http://www.find-mba.com/board/38133
and
Which MSc's are better than pre-experience 'Freshers' MBAs? www.find-mba.com/board/22783
Honestly for that much, around 15,000 euro for an non-EU student, you could get an MSc from a serious business school like Lancaster University, Novancia Business School, University of Westminster, Salford or Oxford Brookes; or an MBA from somewhere internationally accredited like the CEU, CNAM, Koc University or Athens University of Economics and Business.

I think it would probably be quite awkward to have 15 years of experience and be surrounded by people who are just out of their undergrad... But that's just me. CEU's MBA is a great suggestion.

This thread came up recently about budget MBA programs in Europe:

http://board.find-mba.com/europe/europe-on-a-budget-37046

Some decent programs under 20k EUR, including Pforzheim, CNAM, AUEB...

If you're focused on the UK and budget is your main priority, there's this list:

http://find-mba.com/lists/other-top-business-school-lists/top-10-mba-programs-in-england-for-25000-or-less

Brunel's MBA is under 20k GPB, for instance...

That simply cannot be the case. That degree will cost at least 8,000 euro even online. I have no idea where you found that figure, but it's nothing like the costs on their website, which does not list the MSc in management as being available online: http://www.northampton.ac.uk/study/courses/distance-learning/northampton-business-school/fees-and-funding

Looks like he deleted his post, I guess he realized that degree wasn't as inexpensive as he thought.