You ask if there is any redress for those who have been dismissed and BM gives you two important points to provide a remedy, which will be to seek compensation or reinstatement from their employer for unfair dismissal at an employment tribunal (ET), very few people seek reinstatement, most require compensation. In my experience the parties settle more than 50% of claims before they attend an ET but you do need to have the correct qualifications to make a claim to an ET.
Are they employees? You can hardly take action against an employer if you are not one of their employees.
Have they been employed for at least one year? If they are employees but do not have one years service they are unable to seek a remedy at an ET, except in specific circumstances.
These are critical questions to answer your original question. Is there any redress for those who have lost their jobs?
No doubt the published figurers do not accurately portray the total unemployed persons, I have little doubt that governments of any persuasion like to present the figures in the best possible light.