The positive action provisions in the Equality Act 2010 will come into force on 6 April 2011. They are voluntary and unlikely to be much used given the difficulty of knowing when two candidates are "equally qualified" so that the one with a protected characteristic can be preferred.
The Equality and Human Rights Commission's statutory Codes will also come into force on 6 April 2011, replacing the current Codes on pre-Equality Act discrimination legislation.
The 2011 Budget confirmed that the dual discrimination rules in the Act will not be brought into force at all (although note that some dual discrimination claims have succeeded under the current law without these express provisions). There will also be a consultation on removing the third party harassment provisions.