Given that you are in Manchester you should look at the surounding universtities as well. Some universities have a Microsoft IT academy which will run certain SQL server courses. These are the same as offered by corporate training companies like QA but at a much reduced price.

Depening on your current income you may also be ellidible for an Individual Learning Account (ILA) from the government which from memory pays out up to £300 per year to be used for further education.

I used this a few years ago to part fund my degree at Paisley University in Scotland, you would need to look into if this is available for you in England as well.