"If the company you are using is a member, then the TSA offers a conciliation service. You may be asked to prove your claim and, on a loser-pays basis, use the association's testing service.
The measure we currently use excludes the Bank of England ... the current rule but there is speculation that she will favour using public sector debt net of financial liabilities (PSNFL).
Alternatively, you can use the purchasing consortium’s online quote tool (many are quick, easy and free to use). Using the tool, you will be able to write your purchasing specification and dispatch it ...