Relatives of the driver killed in a chase near the White House have told police that she had mental health issues, NBC News reports citing a senior law enforcement official.
Miriam Carey, 34, is said to have had a fall a couple of years ago leading to the issues.
Carey's employer corroborated that she had suffered a fall, and that she had returned to work pregnant.
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The plans had been in development since 2014, but would help underline Britain as a "global player" following the Brexit result.
The number of calls about children suffering or witnessing emotional abuse or physical violence in the home has surged in recent years.
The curtain will come down on the show for the final time at the Piccadilly Theatre in March next year, before embarking on a UK tour.