Asked if he still thought that UKIP voters are "closest racists, loonies and fruitcakes" the Prime Minister told ITV News: "We live in a competitive, political world and people make their choices. I'll choose my words carefully. I want people to support my party.
"I'll let people make up their own minds but at the end of the day, at the next election there is going to be a very straight choice. It will be a red, blue choice."
More top news
Monica O'Connor and at least two other people were killed in the incident, and a British man remains missing.
Lively downpours across the south, Wales and Northern Ireland today - slow moving and intense with hail and thunder.
"The council's inspector judged there was an imminent health risk and an immediate voluntary closure of the takeaway was agreed."