Uk anchestory visa with criminal record

Good day,
I have a grandparent who was born in Scotland and I would like to try to get my uk visa. I have 2 duis (8 years ago) a armed robbery  (9 years ago) which resulted in 12 months house arrest and a dui I got this year and received probation. most of the charges are deemed "spent" now, will this prevent me from getting a uk visa?

Given the number of people trying to get visas and the political pressure to reduce numbers, it isn't going to help.

Is it worth even attempting in your opinion?

No it's not worth attempting.