SNP MEPs Ian Hudghton and Alyn Smith are backing moves to review the current restrictions on the quantity of liquids passengers are allowed to carry on board aircraft in the EU.

Both MEPs voted in favour of a resolution at the European Parliament in Strasbourg which asks the European Commission to review the restrictions and ensure they're proportionate to any risk. The vote was carried by 464 in favour, 158 against and 70 abstentions.

The restrictions were introduced in September 2006 following the alleged plot to blow up transatlantic flights the previous month using liquid explosives. Since then passengers are only permitted to carry on board aircraft liquid in containers up to 100ml which must be placed in a transparent re-sealable bag and inspected at airport security.

Speaking after the vote in Strasbourg, Ian Hudghton - a member of the Parliament's Transport Committee - said:

"We need restrictions that are realistic and in proportion to any potential threat. We all take the need to guard against terrorist threats very seriously but our response has to be proportionate and justified.

"There is cross party concern that the current restrictions imposed by the European Commission are disproportionately costly and disruptive. We would like to see the situation reviewed, and if these restrictions are to continue, then the Commission needs to clearly justify why they're needed."