You never said he died so recently. So I'm absolutely amazed that you are now in a hurry to have the will sorted out. What do you expect people to achieve in 2 months. Even in Ireland it can take months just to get the grant. These are no easy matters.
As regards his partner, she is a person in her own right. She may have entitlements. It is not uncommon for people to inadvertantly leave someone out of their will, never getting around to changing it. It's also been known for people to purposely leave their spouse out of their will, it was why in Ireland the Family Home Protection Act was brought in. It's also why many countries have laws on protection of spouses and children. In Ireland, children have no automatic right. And times have moved on, and live in partners, which is so common nowadays, are recognised and given rights too. In any case, the mere fact they lived together means you should give her respect surely.