BHPS TTWA codes
In the user guide for the BHPS' TTWA identifiers it says "Travel-to-work areas are as defined in 1998 and are based on those electoral ward boundaries existing on 21 April 1991 (Census day)", and the range of codes is described as 3-digit numerical.
However, in the actual data, 9-digit alphanumerical codes are used.
Please confirm which TTWA coding is used in the data. (Are these the 2001 TTWAs maybe?)
Updated by Stephanie Auty about 4 years ago
Thank you for bringing this to our attention. The first page of the User Guide, as you have pointed out, is incorrect, however, the second page is correct and states that the lookup table is based on the November 2013 version of the ONS Postcode Directory. Further down the page it notes that TTWA is of type str9. We can confirm that 9 digit alpha-numeric codes are used in the data for TTWA coding and that these are 2001 type TTWA’s as defined in the November 2013 ONS Postcode Directory User Guide.
Stephanie - Understanding Society User Support Officer