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A MYSTERY plane caused concern this afternoon as it crisscrossed Scotland for hours.

The Bombadier Global Express made numerous passes over the Inverclyde and West coast areas, flying as far west as Islay before looping back to the mainland.

According to the flightradar24.com website, the private jet flew up from just north of Sleaford, Lincolnshire, before making several passes over areas including Port Glasgow, Jura , in the Inner Hebrides, and as far south as Moffat, and Gretna, in Dumfries and Galloway .

On Twitter, johnnyren tweeted: “Anyone else watching the guy taking the glex for a spin on flightradar?” And George Munro posted: “RAF spy plane apparently. GLEX Sentinel.”

It left Scottish airspace at around 6.35pm, and headed back in the direction it had come from earlier in the afternoon.

A spokesman for the Civil Aviation Authority said there was no comment they could make regarding the plane.