Use Firm#offices.any? so we get a SELECT 1 instead of SELECT *
Use Firm#offices.any? so we get a SELECT 1 instead of SELECT *

Profiled this, it didn't make a significant difference to running
time when tested locally, but it still seems like a reasonable change at
least from a consistency point of view.

moneyadviceservice/mas-rad_core,moneyadviceservice/mas-rad_core,moneyadviceservice/mas-rad_core