So our current national debt is £2.9 trillion, and this government have been increasing borrowing by an extra £150bn per year. But the 0.5% increase would only apply to new borrowing.
So for a start that's £750million for the brand new debt (ie extra 0.5% on £150billion - assuming a left wing government doesn't increase the borrowing even faster).
But presumably we also need to re-issue some of our debt each year, as the gilts mature. Does anyone know what percentage of our £2.9 trillion debt needs to be re-issued each year? i know that gilts vary: from a few years right up to 50 years.
Anyone know how it's split, and how much we need to re-issue each year?
If it's 10% (eg if 10 year gilts make up most of the debt) then an extra 0.5% would cost us £1.45 billion extra each year. That's in addition to the £0.76 billion on the new debt- so an extra of just over £2bn per year.
If it's 20% (eg 5 year gilts make up most of the debt), that goes up to £3.6 billion extra per year on debt interest.
Pretty sure Rayner or Milliband aren't worth that cost...