Although the Commission hasn't made a big deal out of it, there's a reference to an complaint against them that was upheld during the election campaign, see below (or read the full report here ).
This is a welcome come uppance for the IEA, it's little more than a busines lobbying outfit masquerading as a think tank and is among the least transparent 'think tanks' in the UK.
The IEA has been behind a series of smears against the charity sector down the years, at various times attacking the Child Poverty Action Group for being too 'political'. It's infamous sockpuppet 'research' was used to smear the charity sector. Then, last year, the IEA was behind an announcement by the Cabinet Office that charities who receive UK funding would themselves be banned from lobbying the government on legislation. A move considered by civil servants themselves to be stupid, unworkable and unnecesarry. It was eventually dropped.
Anyway, it turns out that the real sockpuppet in all of this was... the Institute of Economic Affairds itself.
Couldn't happen to a nice bunch.