Sympathies to you on your loss. Contact probate office and see if the will has been dealt with. From the date probate is granted you have 6 months to contest it if you so wish. However I believe it is a difficult process and unless your father had already been deemed non compis mentis at the time the will was written, it will be hard to prove it now. It's a shame your father didn't include you in the will. As regards other siblings, I personally wouldn't get involved in any issues surrounding what they should or shouldn't have been left by your father. Let them sort it out between them. From personal experience probate took 5 months via solicitor. If the executor is putting in a personal application (not using solicitor to execute the will) then it takes longer.