SASPAC & Census flow data

The Data

The Census Offices are preparing to begin publishing the 2011 Census flow data, these tables will include 4 datasets:

  1. Special Workplace statistics (SWS) – travel from usual residence to workplace (or place of study in Scotland)
  2. Special Migration statistics (SMS) – address 1 year prior to census day
  3. Special Student statistics (SSS) – student migration
  4. Special Residence statistics (SRS) – location of second residence

For all 4 datasets a set of England & Welsh and UK tables will exist.

How will I be able to access the data?

ONS have developed 3 levels of licence to access the data:

Public: openly available anyone and accessible to SASPAC users like any other Census data. These will include a small number of simple tables published for large geographic areas such as local authorities/MSOAs.

Safeguarded: available to researchers under a separate licence agreement. SASPAC are currently working closely with ONS and the UK Data Service to enable these tables to be available to our users on the day of publication (at this stage it is expected that the Safeguarded data will require users to agree to individual terms and conditions which will allow them to download the data in a SASPAC format. Data will then be accessible like any other dataset in SASPAC on their desktop).

These are slightly more detailed tables for larger geographies or simple tables for smaller geographies such as OA/WPZ/ward.

Secure: accessible via the ONS Virtual Microdata Laboratory (VML) held at Titchfield, Southampton. These will include the most detailed cross tabulations, available for the smallest Census geographies and data will only be released to users following ONS approval. SASPAC will be available to access these tables in the VML.

A new VML is currently under development by ONS and expected to be available at other sites across the E&W towards the end of the year.

When will the data be published?

Public tables: 25 July – 9 for E&W (3 SWS/6 SRS)  and 11 for UK* (6 SMS/3 SWS/2 SRS). These are ‘priority tables’ and more tables are planned from November 2014.

Safeguarded tables: August (date TBC) – 4 E&W (SMS) and 10 UK* (4 SMS /6 SWS). These are ‘priority tables’ and more tables are planned from November 2014.

Secure tables: details and date TBC

* Initially UK tables with only include England, Wales and NI flows. This is because issue has been identified with the Scottish data by NRS.

How to access the data?

Public – available to SASPAC users in the usual manner; users will be informed when system files are available for download.

Safeguarded – available to researchers under a separate licence agreement. SASPAC are currently working closely with ONS and the UK Data Service to enable these tables to be available to our users on the day of publication (at this stage it is expected that the Safeguarded data will require users to agree to individual terms and conditions which will allow them to download the data in a SASPAC format. Data will then be accessible like any other dataset in SASPAC on their desktop).

These are slightly more detailed tables for larger geographies or simple tables for smaller geographies such as OA/WPZ/ward.

Secure: available through SASPAC via the ONS VML

What SASPAC support will be available?

The SASPAC team are currently preparing/updating training materials to support users’ access to the 2011 flow datasets. We expect to make half-day training sessions available to users and we will post dates on our website shortly. In the meantime, if you wish to get familiar with the 2001 flow data, the data may be downloaded from our website along with supporting 2001 training materials.

2 Responses to SASPAC & Census flow data

  1. Doocey, Mike (New Economy) says:

    I spotted a rather odd result for the workplace flow from Sheffield to Bury – 1,193.

    The flow from Bury to Sheffield is only 41 and I would expect the flow from Sheffield into Bury to be about the same. Consists of 316 males and 877 females.

    Mike

    Michael Doocey
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  2. SASPAC says:

    Hi Mike,

    We have loaded the OD data into SASPAC but spotted a few issues ourselves, so are waiting for ONS to investigate these before we publish.

    I agree that the Sheffield flow to Bury issue looks high at 1,193, it’s the 11th highest flow from Sheffield and twice as large as the flow to Manchester. Although the pop bases are slightly different (16+ and 16-74), the workplace population travelling over 60km to work in Bury is 1,640, so 70% of these workers appear to be travelling from Sheffield LA alone…sounds unlikely?!

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