The recent G8 summit in Northern Ireland cost around £75m sterling in policing and security costs, it has been revealed.

About 8,000 police were on duty during the two-day gathering of world leaders in Co Fermanagh last month.

A huge steel barrier costing over £4m was erected to cut off the small island on which the Lough Erne hotel sits.

Every road surrounding the exclusive resort, including single-lane farm tracks, were shut to all but a handful of local residents.

Only two arrests were made as protests against figures like US President Barack Obama and his Russian counterpart Vladimir Putin stayed peaceful. A wire fence near the Lough Erne resort was breached for a short time but the demonstration did not turn violent.

The UK government picked up £60m of the cost and the rest of the policing bill was paid for by Stormont's Department of Justice.

Another £5.1m was spent on road improvements near the venue, a publicity campaign to maximise the economic benefits from the event, and money for ambulance and fire services.

"We must recognise that the G8 event has the potential to generate huge economic benefits for Northern Ireland. That is why the event will be followed by an investment conference in the autumn,'' Stormont Finance Minister Sammy Wilson said today. "Of course, we will not know the full economic benefits for years to come,'' he added.