Firstly, how long has he worked there? If less than two years than he has not got much of a legal leg to stand on. Up until April 2012 you only needed to work at a company 1 year to get rights, now it is 2 years.
If he has worked at the company 2 years, then he does have legal rights. They can't get rid of him on those terms unless they have gone through all the correct disciplinary and/or performance improvement proceedures: verbal warning, written warning, steps to improve etc.
The only time the 2 year rule does not apply is for being fired for discrimination - sexual, ratial, disability or age. Those rights apply from day 1 of your employment and if the reason a person is got rid of is due to their face not fitting due to their religious beliefs or because they are too old/young etc. That is illegal.
Secondly, a company can make a role redundant without discussion first if less than 20 people are being made redundant. If there were more than 20 people, then a full consultation period needs to take place first. I don't think from your note that more than 20 people are going so this seems to be irrelevant.
Thirdly, does he belong to a union? He can get free legal advice from his union.
Fourthly, good luck. My dh is in a very precarious position too. He works for a massive financial company who are pressuring him to change his contract in order to remove contractual benefits. He doesn't want to sign it. However, in today's economy and he is nearing 50, I am very worried this could happen to him too. He will have worked at his company 2 years on 18 December. I'm telling him not to rock the boat etc. However, he doesn't have it in him. He is a born maverick and it terrifies me.