When David Cameron made Emma Harrison a 'Tsar' (I wish they wouldn't use that word; it is the name for a supreme ruler in Slavic Europe, not someone who does some work in England in return for an eventual seat in the Lords), he knew nothing about the fact that her company had been, and was still being, investigated for various frauds from the public purse.
So he appointed her to a high level advisory role, where she, in her own words, 'popped in and out of number 10', without checking on her at all. But that's not surprising. He took on Andy Coulson as a paid member of staff without checking on his background either.
The Department of Work and Pensions did know about her fraud cases, and yet, despite her expertise being in the realms of the DWP's remit, Cameron seems not to have asked Iain Duncan Smith for his input.
However, it probably wouldn't have made any difference, because despite knowing about the alleged fraud, the DWP awarded yet another contract, worth nearly half a billion pounds to A4E.
Does anyone do any background checks on anyone in the London government? And if they do, do they ever pay any attention to them?