Plans for a rail tunnel under the Strait of Gibraltar linking Morocco and Spain have taken a step forward with the agreement in January that a E 25M geological investigation should be carried out.
The 38.4km long twin bore tunnel would be excavated between Punta Paloma on the south west coast of Spain near Tarifa, and Punta Malabata, near Tangier, in Morocco.
It would lie between 100m and 300m beneath the sea bed, which is 300m below sea level. A shorter 19km long tunnel could be built further east, but would involve construction under 900m of water.
Construction cost is expected to exceed E 2.4bn.
A decision on whether to go ahead with the project will be taken in 2008.