redwelshdragon any solicitor that won't tell you what you can get for £50 should be avoided. Usually, it will inolve listening to the situation and advising what legal rights your grandson has to see hs child. He can get that information elsewhere by looking on the internet, so he would be better arming himself with what he knows he is entitled to, and going along to ask what is the next step? Grandparents don't have rights, but the child does. The solicitor can advise him what action he can take if he can't afford another session.
It's worth joining Families Need Fathers or Fathers4Justice to get lots of good advice and support. They have support groups and 'buddies' who have been in the same situation. They have good legal knowledge, too.
Your grandson can make an application for contact. If she clams it's not in the child's interest to see the father, this can be assessed. She can't just palm him off if he has one nothing to harm the child. Act quickly, as diminishing family contact that has been beneficial for the child needs to continue.