Flow Data Information System

2001 Census: Special Workplace Statistics (Level 2)

Contains journey-to-work flows within and between wards in the UK. The set of wards used are as follows:

ST and CAS wards are identical for the most part; however in a few cases small CAS wards have been merged with larger neighbours in order to satisfy output thresholds. No such merging was necessary for Northern Ireland, so there is no distinction between ST and CAS wards there.

The mixture of wards is unique to the 2001 interaction data, and the set have therefore been referred to as interaction data wards.

Note: The Special Travel Statistics (STS) contain journey-to-work information for residences in Scotland.

Users can choose from 356 counts in 6 tables. This set of 356 counts includes a number of totals and sub-totals; the number of interior cells which form the basis of these sub-totals is 174.

All the 2001 SWS data have been derived from the 100% sample and include imputed households. Where workplace locations were unknown, these were also imputed.

Disclosure control

Data associated with residences in England and Wales (i.e. all of this dataset) have been modifed via a process known as Small Cell Adjustment Methodology (SCAM). The SCAM process is a disclosure control mechanism. For all tables process using SCAM, interior cells with a 'small' value have been adjusted. 'Small' values are understood to be in the range 0-3. Cells with an initial value of 1 have been rounded to either 0 or 3, with 0 being the more likely result. Cells with an initial value of 3 have also been rounded to either 0 or 3, but with 3 being the more likely result. Cells with initial values of either 0 or 3 have retained these values although in each case it is impossible to distinguish between rounded values and 'genuine' 0s or 3s. All sub-totals and totals have been re-calculated from the rounded cells.

There are three noticeable effects of SCAM

  1. Within-table modification. For the majority of outputs, it will be apparent that a large proportion of cells within any table are either 0 or 3, and that sub-totals and totals within the table are multiples of 3.
  2. Between-table variation. SWS Levels 1 and 2 contain several output tables, with the result that a number of values (e.g. 'total migrants') can be found in more than one table. Due to SCAM, these values may not be consistent between tables.
  3. Between-level variation. The three spatial levels for which the SWS are available were independently subject to SCAM. Thus, if a particular value (e.g. 'total migrants') is calculated by aggregating from one spatial level to a higher one, and compared to the value found in the SWS data set for that higher level, those values are unlikely to be consistent.

Users are advised to ensure that data they use has been calculated by summing the minimum number of base values.

Citation information

The following statements should be attached to all output produced using this data set

Data from this set should be cited in a bibliography as:

Office for National Statistics, 2001 Census: Special Workplace Statistics (Level 2) [computer file], UK Data Service

Further information

The following pre-defined totals are available from this data set:

There are 6 tables defined for this data set:

The data are available for the following geographies:

Geographies of origin areasGeographies of destination areas
Supported directly
[i]UK interaction data wards 2001
[i]UK interaction data districts 2001
[i]CIDS 1991/2001 common geography - 'districts'
[i]CIDS 1991/2001 common geography - 'intermediate'
[i]CIDS 1991/2001 common geography - '100 zones'
[i]CIDS 1991/2001 common geography - 'city regions'
[i]2001 STS / SWS other destination categories
[i]UK interaction data wards 2001
[i]UK interaction data districts 2001
[i]CIDS 1991/2001 common geography - 'districts'
[i]CIDS 1991/2001 common geography - 'intermediate'
[i]CIDS 1991/2001 common geography - '100 zones'
[i]CIDS 1991/2001 common geography - 'city regions'
Supported via aggregation
[i]UK Government Office Regions (1999-)
[i]UK Standard Table Wards 2001
[i]United Kingdom - member countries
[i]Great Britain and Northern Ireland
[i]2004 ONS Rural and Urban Area Classification, 2001 CAS Wards
[i]2001 ONS ST Ward Classification Supergroup
[i]2001 ONS ST Ward Classification Group
[i]2001 ONS ST Ward Classification Subgroup
[i]2001 ONS ST Ward Demographic Indicator Deciles
[i]NUTS 2 UK Regions
[i]United Kingdom
[i]2001 CIDER Migration Classification
[i]2001 GB Districts plus Northern Ireland
[i]Great Britain Districts (plus Northern Ireland) 2009-
[i]Travel To Work Areas (TTWAs) 2001
[i]UK Government Office Regions (1999-)
[i]UK Standard Table Wards 2001
[i]United Kingdom - member countries
[i]Great Britain and Northern Ireland
[i]2004 ONS Rural and Urban Area Classification, 2001 CAS Wards
[i]2001 ONS ST Ward Classification Supergroup
[i]2001 ONS ST Ward Classification Group
[i]2001 ONS ST Ward Classification Subgroup
[i]2001 ONS ST Ward Demographic Indicator Deciles
[i]NUTS 2 UK Regions
[i]United Kingdom
[i]2001 CIDER Migration Classification
[i]2001 GB Districts plus Northern Ireland
[i]Great Britain Districts (plus Northern Ireland) 2009-
[i]Travel To Work Areas (TTWAs) 2001

Output for geographies that are only supported via aggregation will take longer than for those supported directly

Table frameworks


Table 1: Age by sex
All persons Aged 16-74 in employment
Full-time student Not full-time student: in employment full-time Not full-time student: in employment part-time
Total Male Female Total Male Female Total Male Female Total Male Female
Total 1 2 3 4 5 6 7 8 9 10 11 12
 
16-24 13 14 15 16 17 18 19 20 21 22 23 24
25-34 25 26 27 28 29 30 31 32 33 34 35 36
35-59 37 38 39 40 41 42 43 44 45 46 47 48
60-64 49 50 51 52 53 54 55 56 57 58 59 60
65-74 61 62 63 64 65 66 67 68 69 70 71 72

Table 2: Family status by sex
All persons Aged 16-74 in employment
Full-time student Not full-time student: in employment full-time Not full-time student: in employment part-time
Total Male Female Total Male Female Total Male Female Total Male Female
Total 1 2 3 4 5 6 7 8 9 10 11 12
 
Not in a family 13 14 15 16 17 18 19 20 21 22 23 24
In couple family 25 26 27 28 29 30 31 32 33 34 35 36
    Member of couple 37 38 39 40 41 42 43 44 45 46 47 48
    Child of couple 49 50 51 52 53 54 55 56 57 58 59 60
In lone parent family 61 62 63 64 65 66 67 68 69 70 71 72
    Parent 73 74 75 76 77 78 79 80 81 82 83 84
    Child of parent 85 86 87 88 89 90 91 92 93 94 95 96
Living in a communal establishment 97 98 99 100 101 102 103 104 105 106 107 108

Table 3: Method of travel to work
All persons Aged 16-74 in employment
Full-time student Not full-time student: in employment full-time Not full-time student: in employment part-time
Total 1 2 3 4
 
Works or studies mainly at or from home or neither works nor studies 5 6 7 8
Underground etc. 9 10 11 12
Train 13 14 15 16
Bus etc. 17 18 19 20
Taxi 21 22 23 24
Car - driver 25 26 27 28
Car - passenger 29 30 31 32
Motorcycle etc. 33 34 35 36
Bicycle 37 38 39 40
On foot 41 42 43 44
Other 45 46 47 48

Table 4: NS-SEC
All persons Aged 16-74 in employment
Full-time student Not full-time student: in employment full-time Not full-time student: in employment part-time
Total 1 2 3 4
 
Large employers and higher managerial occupations 5 6 7 8
Higher professional occupations 9 10 11 12
Lower managerial and professional occupations 13 14 15 16
Intermediate occupations 17 18 19 20
Small employers and own account workers 21 22 23 24
Lower supervisory and technical occupations 25 26 27 28
Semi-routine occupations 29 30 31 32
Routine occupations 33 34 35 36
Never worked and long-term unemployed 37 38 39 40
Full-time student 41 42 X X
Not classifiable for other reasons 45 46 47 48

Table 5: Occupations
All persons Aged 16-74 in employment
Full-time student Not full-time student: in employment full-time Not full-time student: in employment part-time
Total 1 2 3 4
 
Managers and Senior Officials 5 6 7 8
Professional occupations 9 10 11 12
Associate professional and technical occupations 13 14 15 16
Administrative and secretarial occupations 17 18 19 20
Skilled trades occupations 21 22 23 24
Personal service occupations 25 26 27 28
Sales and customer service occupations 29 30 31 32
Process, plant and machine operatives 33 34 35 36
Elementary occupations 37 38 39 40

Table 6: Employment status
All persons Aged 16-74 in employment
Full-time student Not full-time student: in employment full-time Not full-time student: in employment part-time
Total Male Female Total Male Female Total Male Female Total Male Female
Total 1 2 3 4 5 6 7 8 9 10 11 12
 
Employees 13 14 15 16 17 18 19 20 21 22 23 24
Self-employed 25 26 27 28 29 30 31 32 33 34 35 36