Bad Credit Car Financing

Financing a car…Bad Credit?
Hi, im just asking for some advice as im looking at buying a car, want to get finance though but i have a bad credit rating (rather stupid when younger) I dont want to go to a company like welcome as the APR is too much and i could have bought 3 cars for the price….
If i paid a larger deposit would that give me a better chance with a lender?
All Advice welcome thanks
forgot to say i am in the UK
best advice i can give you is check your credit history pay it off its no excuse “when i was young” and slowly rebuild it up to a better standard
until you pay your depts your credit checks will always be bad
when you pay any outstanding debt and settle it ask for the dept to be noted on your credit history as paid and get a settlement note off them