The level of profits don’t particularly matter in these situations. The important part to those running the business is that profits have dropped by two thirds, or to put it differently, are only a third of what they were the previous year. If the problem is left unchecked then next year there is a very real chance that the same reduction will occur leaving the business with a massive loss (potentially £4 billion in the highlighted case) and most likely in administration with a loss of all jobs. Another business with a profit drop from £12,000 to £4,000 in a year would have the same issues, just on a smaller scale.
Unfortunately the quickest, simplest and usually most successful way for any business to reduce costs / increase productivity is to reduce employee numbers. After all, if things pick up again in the future numbers can increase again.