The Conservatives plan to increase the number of Westminster seats they hold in Scotland by keeping "under the radar" at the next General Election.

The Tories famously spent more than £1 million in the last General Election in 2010 and targeted 11 constituencies but failed to get a single extra MP elected.

Conservative strategists found the more they told the electorate the party had a real chance to win a seat the more people were motivated to go out and back their opponents.

As a result, senior party sources plan to keep a lower profile with many voters at the next General Election, due in 2015.

Instead, they will rely on ­sophisticated election techniques which mean they can target only those who might be sympathetic to their cause.

The system means the party will run less of a risk of alienating voters who still consider the Tories to be "toxic" in Scotland.

A senior party source said: "We have a good chance in 2015 by keeping under the radar.

"New techniques means that we can be sure when we send out messages to voters that it is only going to those who will be open to what we are saying.

"We will not end up ­accidentally getting our message out to people who are so actively turned off by us they go and vote for our political opponents".

In 2010 the party only managed to win one seat, that already 
held by David Mundell in Dumfriesshire, Clydesdale and Tweeddale.

The lack of electoral success has led to jibes from their political opponents that there are more Pandas in Scotland than Tory MPs.

The Conservatives have long struggled with their image north of the Border.

The party has failed to shrug off associations with Margaret Thatcher.

The Scottish Conservatives also failed to benefit from the rebranding as "caring Conservatives" under David Cameron after he became leader in 2005.

Despite this, the Conservatives are ­confident that they can increase on their MP numbers in 2015.

However, opponents suggest any success in Scotland will be even harder to achieve when the party is in a Government presiding over massive spending cuts.

Many political parties have turned to more targeted campaigning in recent years, using techniques honed in recent American elections.

The Liberal Democrats used such a system earlier this year when they held on to the seat of Eastleigh in England.

This was despite the jailing of former MP Chris Huhne after he admitted asking his wife to take his speeding points.

A spokesman for the SNP said: "It seems the Scottish Tories are desperately hoping they can keep their heads down and continue to rule Scotland from Westminster - no matter how few Tory MPs actually get elected in Scotland."