No so em10.
Brown supported John Major's ERM venturebut was lucky enough to learn that lesson while in oppostion. While still in opposition he formulated his 5 tests which were designed to reign in Tony Blair's Pro Euro steamroller.
// Guided by his new protegee, Balls, shadow chancellor Brown decided that the euro project would be too restrictive and deliver stability only at the price of low growth and long dole queues. The shamelessly subjective "five tests" for British membership which the pair devised were also useful for reining in Tony Blair, who didn't do economics - while embarrassing the Tories as "Little Englanders".
As chancellor Brown rightly realised that eurozone rules would require him to slash his ambitious public spending plans and lower interest rates even further than was already happening inside an over-priced currency. Thanks to its financial sector the UK economy boomed for a decade, then crashed worse than the sluggish eurozone.
But Britain enjoys greater freedom of action to dig itself out of trouble, not least via its flexible exchange rate and labour market, denied to struggling eurozone members like Greece, Ireland and Portugal under deflationary pressure from their paymasters in Berlin. //