I can second what Vicky said, lots of landlords do require a credit check. Since I was new to the country, I had to have my BF act as a gaurantor, even though he wasn't moving in with me. I think it's completely fair that they require credit checks, if there is a chance you won't be able to manage your money and not pay rent for a few months, they will be screwed. Here in the UK, I understand it is pretty difficult to get a bad tenant out of a flat.
If you are moving over here to be with a partner, make sure their credit is good enough. If you are moving for a job, maybe get your employer to write you a letter of reference. If you are moving over on your own....maybe a family member could be a gaurantor?
It will take a few months to build up a credit history here...
Open a bank account.
See if they will give you a credit card. If not right away, try again in a few months.
Open some low limit store credit cards if possible.
Make sure to pay your utility bills on time. That will definitely help your credit check.