This is the house that Dave built

Arriving at No.10 for a press briefing journalists were warned by the prime minister to watch out for head lice, as his children had brought them home from school.

"If you find them when you get home, I apologise. Let me know and I'll send you a comb and some ointment," he said.

First it was rats and now it is head lice, it almost makes us want to break into rhyme…

This is the house that Dave built.

This is the louse that lay in the house that Dave built.

This is the rat that ate the louse that lay in the house that Dave built.

Now they just need the cat to kill the rat that ate the louse that lay in the house that Dave built.

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