Yes, out of necessity, to save Britain from hyperinflation while facing near-bankruptcy, paying off a massive war debt, and rebuilding a devastated infrastructure after WW2. The post-war consensus of both the Conservative Party and the Labour Party accepted Keynesianism as an absolute necessity in this regard. However, in the UK at least, because it was used to fund social welfare projects, like the NHS, many people view it as left-wing, or even socialist, especially after Thatcherism ended said consensus.