If i want to buy a house do i need good credit ratings?

i want to get a mortgage for a house in the future and just wondering do i need a good credit rating?

i currently have:
- 0 credit cards
- 0 loans (except student loan)
- i have never borrowed or owed any money (except student loan)
- i have a current account + debit card
- a savings account

i currently pay for:
- electric (direct debit)
- internet + phone (direct debit)

thats all really.

so any changes i need to make? Or do?

right now i have 15,000 in my savings account and a few hundred in my current.
Added (1). note: i have no clue on how to gain or get a good credit rating.

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