ONS published a 2011 Census update letter earlier this afternoon, reporting on imminent plans for Census releases 3 and 4. Key points from this letter are:
- Non-UK born short-term residents and detailed tables relating to Passports Held, Country of Birth, and National Identity will be released 26 March.
- Release 3 will now be Detailed Characteristics at local authority level, followed by MSOA and Ward geographies, and will begin in May.
- Local Characteristics data will now be Release 4 (summer).
- More details of the exact timings of these releases are expected in April.
As usual, all of the above data will be available through SASPAC.
SASPAC 
When do we get unit postcode head counts?