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Contrary to the statement in this article and the source referred to in the BJGP this year, there is a measure of deprivation in the Global Sum allocation formula.
I set this out in a response to a 2014 BMJ publication by Boomla et al. (1)
We came across the measures as we stripped down and re-calculated practice allocations from the ground up, applying the formula to the raw data. (2)
This uncovered a scandalous underfunding of Welsh practices, that has not been addressed since our publication in 2006. It required several months of Freedom of Information requests to unravel the elaborately constructed calculations to cloak the inequitable payments.