More than two-fifths of voters intend to back the SNP at the next Holyrood election compared with little more than a quarter for Labour, a poll commissioned by the SNP suggests.

The SNP has a 15-point lead over Labour in Scottish Parliament constituency voting intentions and a 10-point lead in the regional vote, the Panelbase poll found.

Some 42% of the 1,049 adults polled say they are voting SNP in their constituency against 27% for Labour.

The two parties are almost neck-and-neck among Scottish voters in the general election, with the SNP just slightly ahead at 37% against 35% for Labour.

Conservative support is fairly consistent across all ballots with the backing of around one in six (15%-18%) for the Holyrood constituencies and regions as well as Westminster.

Just one in twenty (5%) will vote Liberal Democrat, about the same as Ukip, who poll slightly ahead of the Lib Dems in the Westminster vote (6%).

SNP business convener Derek Mackay said: "Coming on top of the SNP gaining more than 50,000 new members since the referendum, these poll ratings are exceptionally good.

"After over seven years in office, the SNP have a 15-point lead over Labour for the Scottish Parliament and are even in the lead for the next Westminster general election.

"At a similar stage in the 2007-11 Holyrood term, Labour had a double-digit lead over the SNP - and we went on to achieve a landslide victory. This time, the SNP have a double-digit lead.

"The situation after the referendum is redolent with opportunity for Scotland and the SNP have the wind in our sails.

"Scotland was promised 'extensive new powers' in return for a No vote in a solemn vow by the Westminster parties.

"They are showing every sign of having to be dragged kicking and screaming to deliver on their vow.

"The more people in Scotland join and back the SNP, the stronger the pressure on Westminster to fulfil their pledge - and that is the key driver in soaring SNP membership and support."

The poll was conducted from September 29 to October 1 among 1,049 adults resident in Scotland aged over 16.