MPs have been warned that an independent Scotland would be acutely vulnerable to economic "shocks".

An independent briefing note by the House of Commons library has told politicians Scotland would be "particularly exposed" to forces outside its control if it left the UK.

It is the second such warning, after a previous note in November said Scotland could be forced to pay billions if it wanted to remain part of the EU.

Labour last night said it highlighted the "huge risk" that the Scottish Government was taking with people's finances.

The note warns that "as a small and open economy, Scotland would be particularly exposed to exogenous shocks i.e. shocks that are caused by factors outside of its control".

These could include significant changes in global energy prices, because of the major proportion of the economy linked to oil and gas.

It adds that the impact of these shocks could be positive as well as negative, depending on which way the markets moved.

Ken Macintosh, Scottish Labour's finance spokesman, said: "This report highlights the huge risk that Alex Salmond is wishing to play with people's lives by taking us down to the road of separation."

SNP Treasury spokesman Stewart Hosie MP said: "Eight of the top ten wealthiest countries in the developed world in terms of GPD per head are small countries – and an independent Scotland would be the sixth-wealthiest, compared to the UK's 16th place."