The Scottish economy grew by 0.4% in the first three months of the year, official figures show.

The latest Quarterly National Accounts Scotland show GDP growth has been revised upwards for the first quarter of 2018, from an estimate of 0.2% published in June.

The revision means that since the same three-month period last year GDP has grown by 1.3% instead of the 0.8% forecast.

Growth in Scotland has outstripped the UK as a whole, where it was 0.2% over the first quarter and 1.2% over the year.

Economy and Finance Secretary Derek Mackay said the figures were "hugely encouraging".

He said: "Figures for the first quarter of 2018 also show that manufactured exports, which make up around half of the total value of exports from Scotland to the rest of the world, have grown by 3.6% reflecting the strength of international exports to the future of the Scottish Economy.

"The Scottish Government will continue to focus on growing Scotland's economy. We are investing a record £2.4bn in enterprise and skills, £4bn in infrastructure and delivering the most competitive package of rates relief in the UK, including the Small Business Bonus, which to date has saved Scottish firms almost £1.5bn.

"We will continue to urge the UK Government to commit to remaining in EU single market and customs union to protect jobs and investment and remove unnecessary uncertainty which could harm Scotland's economic prosperity."

For the financial year 2017-18, the value of Scotland's onshore GDP is estimated at £156.5bn, or £28,797 per person, in current prices.

Including a geographical share of UK offshore and overseas economic activity, Scottish GDP is estimated at £170.4bn in total, or £31,367 per person.

Murdo Fraser, Scottish Conservative shadow finance secretary, said: "Despite all the revisions up and down, one thing is clear - over the last few years, Scotland's economy has under-performed.

"We need to see focussed government action supporting enterprise, and a tax system that incentivises entrepreneurs to make Scotland their home.

"Unfortunately, Nicola Sturgeon's anti-growth agenda proposes the exact opposite - a compete muddle of an economic plan and a tax regime that taxes jobs and investment.

"We need less talk of independence - and more action to sort out Scotland's economy."