What is a "sock puppet"? Wikipedia defines it as an on-line identity used for purposes of deception.
For our purposes I would narrow that definition to government-funded (and therefore subject to government control) organisations that have the appearance of being independent, and I would widen it beyond the original on-line constraint. Deception in this case usually relies upon the reader not actually checking out the organisations' sources of funding.
The Institute for Economic Affairs has been on the case since at least 2012, when it published a paper on sock puppets (updated 2014). It may come as no surprise that they also identified the EU's version as Euro puppets in 2013. However, it seems that Edward Heath and George Pompidou were well ahead of the game when they set up the FBC back in 1972.
The Franco British Council
See our FBC page.
The Royal United Services Institute
Continuing our defence theme, first up is the Royal United Services Institute, "the world's oldest independent think-tank on international defence and security". Helpfully as at 14th March 2018 it lists its supporters ranked according to decreasing contribution levels for 2015-16; this is headed way out in front at at over £1,000,000 by the European Commission! Trailing behind the Commission at less than £500,000 are other groups including BAE Systems, our very own Foreign and Commonwealth Office, HSBC, Ministry of Defence, Qatar Ministry of Foreign Affairs, Standard Chartered Bank, and more - you can read the full list for yourselves by following the link above.
Clearly this body qualifies as both a Sock Puppet and a Euro Puppet. Any idea that this institute is an independent body is manifest eye-wash when it is dependent on so many agencies of government for its funding. Quite why banks are so prominent in the list of donors is a question worth pursuing, but sadly this site has neither the time nor the space (although, off at a slight tangent, the YouTube channel Best Evidence has some startling and unmissable videos). And Qatar? We don't venture into foreign relations here.