REUTERS/Toby MelvilleLONDON, Sept 23 (Reuters) - Britain's new economic agenda of tax cuts and high spending do not represent a gamble because improved economic growth will pay for it, cabinet minister Simon Clarke said ahead of a major fiscal announcement on Friday. Close to 200 billion pounds ($225 billion) of tax cuts, energy subsidies and planning reforms are due to be announced by new finance minister Kwasi Kwarteng as part of Prime Minister Liz Truss's bid to spur growth. "The critical thing is we need to get the economy growing so that, frankly, the economic growth trajectory outstrips that of our debt." Truss has aspirations to double the long-run rate of British annual economic growth to 2.5%. Clarke said the metrics of success would be in improved economic growth.

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