From Derbyshire Dales EIP
With the recovering economic situation it would be prudent to assume that the low 2011 headship rates are unlikely to remain in place over the whole plan period. It would be sensible to work on the basis that the household formation rate will gradually return to higher levels as the economy recovers. I therefore consider that a “blended” rate that assumes the 2011 rate until 2020 and the higher 2008 rate thereafter is appropriate. Whilst this may be a relatively unsophisticated approach, it is a practical one in the light of the uncertainties about future household formation rates.
Note the stinging criticisms that the council did not consult on its OAN pre submission and hence did not meet the statutory SCI requirement.