Comment by klelatti

The people (about 2,000) are London based and work for a UK registered company so in both practical and legal senses the work is in the UK (eg employment taxes are paid in the UK). That the product of that work may be sold to another country for a price that transfers profits elsewhere doesn't change either of these facts.

I don't agree with the statement that you're challenging but Google DeepMind's operations in London make it (still) an important centre for AI research and is probably why the UK is ranked third on many international AI country rankings.