This budget presentation outlines the key themes and changes from the UK's 2011 budget. Plan A to reduce the deficit will continue with no alternative Plan B. The budget forecasts lower economic growth in 2011. Personal tax allowances will increase in 2011-2012 and 2012-2013 but higher rate taxpayers will see smaller benefits. The higher rate tax threshold remains unchanged and CPI will be used for indexation from 2012-2013. National insurance contribution rates will increase by 1% and the annual pension allowance will decrease to £50,000.