Supplementary written evidence submitted by Mark Barry, Professor of Practice in Connectivity at Cardiff University, School of Geography and Planning (RIW0020)

This submission should be read in conjunction with Professor Barry's previous submissions:


Barnet calculation based on the Treasury Barnett comparability factors for the DfT and Wales, Scotland and NI

Statement of Funding Policy 2020.docx (

In summary for DfT relevant to Wales


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In simple terms any Barnett allocation is based on the following


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So for example, a £1BN increase in HS2 budget would lead to a £1Bn increase the DfT budget, on the basis of the above CF then the Barnet allocations are approximately:

Scotland             = £1Bn* 92% * 10%        =  £92M

NI                        = £1Bn *95%  * 3%         =  £29M             

Wales                 =£1Bn  *36%  * 5%         = £18M


Applying that process to  the entire £108BN allocated to HS2 on the same basis as a change to DfT budget

Scotland             =  £9.9Bn

NI                        =  £3.1Bn

Wales                 =  £1.9Bn


One could apply the same to NR Enhancement funding which is calculated the same way as HS2


March 2021