Labour leader Ed Miliband has said the the government's handling of the immigration system is "turning into a shambles", following reports that language certificates that offer smooth entry in the UK are being sold illegally for £500.
"We want tough controls, we want the right controls to be in place," he said. "I think we need urgent answers on what has been going on here."
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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.