This week’s Big Question provides a stark illustration of the direction in which work flows between firms in the US and Europe, with UK-based partners confirming that they refer most of their cross-border work on into Europe and receive most referrals from the US.

Not only does this finding underline the key driver behind the explosion of expansion by so many UK firms into Europe, it also raises the enticing prospect of history repeating itself as the US invasion into London plays out.