Last Thursday England elected 297 Conservative MPs,191 Labour and 43 Liberal Democrats. Scotland will send to Westminster 41 Labour MPs, 11 Liberal Democrats, 6 Scottish Nationalists and 1 solitary Conservative. Similarly distinctive results were returned in Wales and Northern Ireland. According to the unbalanced constitutional geometry created since 1997, Scottish, Welsh and Ulster representatives may yet determine who governs Britain, but English MPs will have scant influence on the Celtic fringe. This anomaly creates potentially divisive tensions that can wreck the UK. They can be salved by the creation of a codified constitution. The Independent asked me to write about it.