AN agreement has been reached for a Dumfries and Galloway airfield to be used as a lorry park in case of post-Brexit disruption at Cairnryan port. The Scottish Government has signed a lease with Stair Estates, owner of Castle Kennedy airfield in Stranraer, from Friday, January 1, as part of Operation Overflow. Up to 240 goods vehicles can park at the site, which includes welfare facilities, if port capacity is too high as freight continues to travel between Scotland and Northern Ireland. Lorries will face new checks on departure due to the Brexit transition period ending on Friday, with Operation Overflow developed as a contingency plan by Transport Scotland and partners including Police Scotland, P&O and Stena.