ok, then you have a few options, or routes through.
first, can you evidence that women are more negatively affected by these changes, for example "centralising resources now means that only 1 in 8 women will have access to work training programmes, versus 1 in 3 men. Prior to centralisation, 1 in 4 women had access." that kind of thing. it will be data crunching and stats, but very effective.
you can also use anecdotal evidence/case studies from women affected by these changes to tell personal stories of the negative changes. i.e Client A has been imprisoned for 3 years and on release was not able to access work programme services because of the cut in provision. Here's Client A's story....
When you've got enough data and information, you can then file a report with whomsoever the powers that be are.
I'd also suggest getting in touch with various lobbying and campaigning groups for female offenders with your evidence and information. Do you have a union you can contact too?
Here's a few charities I found who may be interested:
BC Trust
Women in Prison
Clean Break
If you can't apply pressure effectively internally, then you are going to need to put the wheels in motion for a media campaign. In order to be successful, you'll need evidence, data and support from charitable groups/MP (or parliamentarian - Yvette Cooper is very hot on this issue and has been banging on at the government for over a year about the demonstrable and unbalanced impact the new government has had on women.
I think you might also get some good advice from the feminist boards on here if this is an issue specifically affecting women.
hope this helps.