It seems to be the case it applies here, it looks like a change of service provision.
In general, the next question mr proud's employers should be asking loudly is whether or not an "organised grouping" of workers exists in the old company who were wholly or mainly dedicated to carrying out that contract - although there are other tests too - and how many of them there actually are, it might only be one.
And what happens next should by no means mean automatic redundancy for mr proud - depending on his time employed, he may also be entitled to claim unfair dismissal.
My own employer has dealt with this twice in the last six months on assuming new business.In one case, the outgoing employer initially claimed twelve people were captured by TUPE, when pushed and tested it turned out to be two.
It's a complicated area of law and ACAS won't advise - you (and mr prouds employers) really do need specialist legal advice.
And it's also horrible for the people involved, so I hope it gets resolved for you.