Emergency services were called to Boston Road at Horncastle after a lorry crashed into the side of a bungalow. The driver was taken to Lincoln County Hospital but details of his injuries have not yet been confirmed.
A gas pipe was damaged, leading to the evacuation of about 30 nearby homes as a precaution. The occupants have now been allowed back in.
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Former Police Inspector Harry White told the inquests that he was told that fans entering the terraces should "find their own level."
A former police inspector has told the inquests he realised fans entering through an exit gate would head towards already crowded pens.