I live in NZ, left some debts in UK. Want to go back for a hol. Am I going to get arresred at the airport????

Not for the issue of debt. If you are wanted on warrant for something else then you take your chances. Immigration will grant entry if they are satisfied that you are a genuine visitor with the funds to support, maintain and accommodate yourself whilst in the UK w/o work or recourse to public funds, and that you intend to leave the UK after the period stated by you. Were the issue of your debts to be known to the arrivals officer then it MAY have a bearing on your credibility and thus your admissibility.
(.....thus you'll feel obliged to conceal this fact, but concealment of a possibly material fact could render you as an illegal entrant by silent verbal deception....but we have negligible interest in New Zealand illegal entrants as they are not exactly top of our tasking........complicated isn't it!)

you cant get arrested for debt in this country

first you have to tell how when did you started leaving your debts and second is how much it was? you can try to calculate the interest and the current balance and see if it worth for you to put jail... if you think you can not afford to pay it then better not to have a holiday there unless you are ready to settle...... remember once you have been jailed and convicted you will have your new name/title.... you will be called John the EXconvict. lol

I doubt it very much. New Zealand is part of the British Commonwealth and as such would have the jurisdiction to deport you. Computerised links through the police databanks would identify you to the authorities and any outstanding transgressions would be followed up, ergo, you would have already been arrested.

no but you should.....leaving debts behind is just like stealing and you really should pay them of..they can follow you and in future you will have trouble getting credit

wondered where you dissapeared to. be seeing you.

people like us brits suffer beacuse people from other places come here abuse the system get more benifts then us and when they feel like they can get of and go when they want

Having debts is not a criminal offence in the UK. You will not be arrested.

debt is a matter of CIVIL law, not criminal law in the UK

which basically translates as it's up to the company you owe the money to seek to prosecute you, the state will not prosecute you