Question: how to buy a house with bad credit rating?
Answer: Save for a bigger deposit. You may need a larger deposit if you have bad credit - for example around 20-30%, instead of 5-10%. ... 
Get help from family. Most lenders will accept a deposit if it's 'gifted' from a family member. ... 
Get a guarantor. ... 
Sort your finances. ... 
Speak to an adviser.