If you are looking for debt collection, AND you have a court judgement, then you may want to consider asking these bailiffs: http://thesheriffsoffice.com/.

I once had them come after me (well, not after me personally, someone had given a false address) but they were very persistent and very professional (when I gave them evidence that I wasn't the right person).  It might be worth approaching them.

The big problem that people have, is that as alpha is a limited company, you can only go after the company's UK assets (of which there are likely none). You cannot go after the people in alpha.

I really think the only option left is for someone to file a petition for involuntary bankruptcy against the company, because this is the only option that will actually hurt the people behind alpha. While you can't force the people to pay up personally, because a bankruptcy penalty is so damaging, they may well pay up personally to avoid the personal consequences.