From The Adam Smith Institute

So it’s official. As of today we are no longer a libertarian think tank. We’re neoliberals. And maybe you are too.

Here is the link.  Here Sam Bowman, the Executive Director, explains:

And I think to most people in Britain the word libertarian connotes a sort of unflexible extremeness – a preoccupation with hard-and-fast rules over policies that actually make people’s lives better. It was this misconception that allowed the Prime Minister get away with equating the libertarian right with the socialist left, as if the two were somehow comparable…

So in embracing the term neoliberal, we’re hoping that we’re being a little clearer about what we already believe in and do. We fight for free markets, property rights, globalisation and an open society, all based on real-world evidence. Those are what have given us the rich, peaceful, prosperous world we live in, and with more of them we can help to make things even better. It’s time for us neoliberals to start going on the offensive and fight for the world we have helped to create.

I do not have sufficient background on the situation to parse this, but perhaps it is also one way of signaling that they are anti-Brexit, and the word libertarian would not do that, and might even suggest they favored Brexit as a means for arriving at a more libertarian society (which by the way is not how things are running).  A neoliberal one would think favors arrangements for free trade and migration.

Addendum: Here is their home page.