A similar exploration in the North sea would cost £4m.

They are also to be found under the North Sea.

What little oil still comes from the North Sea we already pay "economic rates for".

Over 230 species of fish live in the North Sea.

This is 65 times the size of the North Sea.

The North Sea is home to about 230 species of fish.

North Sea oil revenue continues to provide an economic cushion.

The situation in the North Sea is of particular concern.

It has a comfortable market here with the North sea at its doorstep.

That is worth about £2 billion a year of the overseas markets won by the industry serving the North sea.