Probably not, but then they would almost certainly have been pulled live because the alternative would be to knock off the whole board - and hence everything it supplies.Are/were they fuses with no upstream switches/isolators?
Bear in mind that contrary to what is being said, there is actually a means of cutting the supply upstream of the DNO's cutout - but it won't be used for the same reason, it would be "somewhat unpopular" if they took out 1/3 of a street because one house was having a new CU.
