Mortgage, Credit card and credit rating

[lemonade]

I will be looking to buy a house soonish but my credit rating is average, mainly due to the fact I have never had a credit card nor even a mobile contract.

Will this have a big effect on getting a mortgage? If so is it worth getting a credit card now and using it to try and up my credit score?

 

[lemonade]

Thanks for all the helpful replies. Seems like mixed opinions. I should have mentioned I already own a property which is going on the market soon. When I bought that I didn't have any credit score, so had to pay double deposit. I'm worried this will happen with the new property I'm hoping to buy which will be bigger and more expensive. My credit score on noddle was 3/5 IIRC, so average, was thinking if a CC will boost it, but from posts here it seems not all providers take it into consideration.

Might be worth getting a credit card anyway? Even though I don't need one financially, I live relatively simple and frugal.