Maybe it might look small if you only consider gov.uk websites but what I mean is that it looks like that everything like everywhere will be changed to take that into account:
Since corporations seek to maximise profit over anything typically considered solely for the benefit of aesthetics: I guess a precedent exists that the cost can be worthy.
1 logo change on average 3 times every 100 years isn't that much, especially if you compare to basically any corporation outside of Mitsubishi in that time.
Police uniforms, mailbox, signs, ...