I have just had a PM from an Alpha customer who has just won a claim. Alpha's defence was STRUCK OUT and a judgement was issued against them. Alpha literally have NO DEFENCE. They have and will pay claims won against them. You can do some pretty heinous shit to a company once you have a judgement, including freezing bank accounts, summoning them to court to reveal their assets and making them bankrupt.
You can also raise the debt with the high court if they don't pay up (It costs around £60 to do this). Once high court enforcement officers are involved they don't mess about. When they turn up they won't be leaving without the money owed - even if they have to strip the place bare of assets.