UK Inflation (CPI) · Explained for Procurement

CPI tracks the price of a representative "basket" of roughly 730 goods and services that a typical UK household buys. ONS reweights the basket every January based on household spending data. Energy, food, housing, transport, and services each carry a weight proportional to their share of household spending.

The headline 12-month CPI rate is the change in the index between the same month a year earlier. Core CPI (excluding energy, food, alcohol, and tobacco) strips out the most volatile components and is the Bank of England's preferred gauge of underlying inflation pressure.

CPIH (CPI including owner-occupiers' housing costs) is a broader measure used alongside CPI. For business energy procurement, CPI is the more actionable number because the energy component maps directly onto wholesale moves.

The Bank of England Monetary Policy Committee sets Bank Rate against its 2% CPI target. When CPI runs persistently above target, the MPC raises rates, raising the cost of capital for every UK business, including energy-intensive manufacturers, multi-site operators with leased estate, and projects dependent on debt-financed capex.

This is the often-overlooked second-order effect of energy price shocks: it is not just your energy bill that rises. Sustained energy-driven CPI triggers higher borrowing costs for the next several years, compounding the headline hit.

Procurement teams increasingly model a joint energy / financing scenario; a hedged energy contract is also a partial hedge against tighter monetary policy. Our trading desk integrates both into the risk framework for Purely Flex clients.