An ITV spokeswoman said the broadcaster was not in a position to comment, but it is understood Roache will not appear in the long-running soap while investigations continue.
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The youngest royal will make her second public appearance later this afternoon when she is baptised in Norfolk.
Jayln Rippy died and her mother and brother were seriously injured by the fish, which can grow up to eight feet long.
European nations are collectively consuming more fish than its waters can provide, according to a new study.