have i ruined chances of a mortgage in future?

my plan is to save a deposit for the next two years then hopefully get a first time mortgage

i was in alot of debt a few years ago i have managed to clear most of it but currently have 2 defaults still on my credit file they are for £129 and £86, the defaults were only registered in 2010 so will still be present when i hoped to get a mortgage in a few years time

is it still possible for me to get a mortgage with these on my file if so how much deposit should i be aiming for

i have a credit card phone line and a catalouge on my credit file as well these are all in the green never missed a payment i will be getting rid of the catalouge asap but im going to keep the phone and credit card as a source to build my credit file back up so it looks more healthier again