1. But the acid test is how they are received by Premier League clubs.

2. Despite all this work, inspectors found acid in five test wells below the wall.

3. It follows acid attacks in London last month, where the victims included riders delivering by bike or moped.

4. Police noticed that one had acid burns on his hands.

5. That happened with acid rain, with the hole in the ozone layer.

6. The time for change has arrived, but any solution must pass an acid test to meet the criteria for success and added value.