– A Foreign Office spokesman
We are aware and very concerned about events at the Spain/Gibraltar border.
Over the weekend, our Ambassador in Madrid has raised our concerns with the Spanish Deputy Foreign Minister and we have registered our protest with the Spanish Ambassador in London.
The Foreign Secretary has also called the Spanish Foreign Minister Garcia-Margallo this evening to express our serious concerns and to urge a speedy resolution to the problems at the border.
The Government is "carefully considering" the possibility of legal action against Spain over the imposition of additional border checks on Gibraltar.