THE pro-UK Better Together campaign has been accused of trying to "politicise education" after it announced plans to send teaching material to every secondary school in the country.

The cross-party organisation is to send teacher resource packs, including lessons plans, research material and a debate kit to schools over the summer.

Better Together's youth representative co-ordinator, Ross MacRae, said the material would be "as non-partisan as possible" but Yes Scotland, the pro-independence campaign, accused their opponents of "crossing a line". A Yes Scotland spokeswoman said: "Our children's education is too important to be politicised in this way."

Details of the Better Together initiative emerged as the campaign sought to build on a survey at weekend suggesting most teenagers opposed independence.

The Edinburgh University study found 60% of 14 to 17-year-olds were set to vote No, with 21% backing Yes and 19% undecided.

Mr MacRae said the schools pack was being prepared at the request of teachers. He said: "The first lesson is about referendums. We are just giving them the resources. They do reflect our message but it's up to the teachers how to use it."

Yes Scotland's spokeswoman said: "We believe Scottish teachers know how to plan their lessons without any help from the No campaign."

l Better Together will launch its London Group tomorrow night at Westminster.

The event will feature speeches from campaign leader Alistair Darling, LibDem Chief Secretary to the Treasury Danny Alexander, and Conservative peer Lord Strathclyde.

It has been estimated some 750,000 Scots live south of the Border with at least 100,000 resident in London.