Today's scenario is an incident involving the transportation of radioactive materials.
"It's extremely unlikely that an event like this could happen for real" said a spokesman for Magnox.
"However we can't allow ourselves to be complacent and need to be prepare for such eventualities".
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The Met Office has issued a Yellow 'Be Aware' warning for strong winds and gusts of 60-70mph on exposed coastal areas
Breezy with further showers, locally heavy, spreading in from the west at times.
Breezy, but winds gradually easing overnight. There will be clear spells and isolated showers through the evening.