When news breaks that a leading firm is to merge, the chances are that rumours of the potential link-up will have already been bouncing around the water cooler for months.

In contrast, McGrigor Donald’s tie-up with the KPMG legal network KLegal and the merger of its London office with the network’s London base came as a shock to the Scottish legal world. Rivals at the time were quick to question the timing of the move at a time when multi-disciplinary partnerships were fast going out of fashion.