Chances of accepting

Jimmy._Jim

Hi.. I am just wondering what peoples thoughts were on chances of being accepted for a mortgage with the info below...
Joint application, one first time buyer one not first time, house to sell and equity to be used as a deposit probably around 55k, person with house has good credit rating no previous issues, second applicant poor credit rating 4 previous defaults all small 3 for less than 150 pounds with phone companies and paid off recently (about 3 years old), one not paid off for 1200 was student overdraft with nwb, homeowner self employed for 7+ years and accepted for previous mortgage whist self employed, company yearly net profit circa 18k, second applicant employeed 20k salary, looking for around 140-160k house price so 100k ish mortgage. Combined monthly outgoings/bills including current mortgage 900.
Sorry for the big block of info
Many thanks