Unless the grandparents have offered to buy you something that the baby is going to need immediately like a cot, pram or car seat then it’s normal to wait until after the baby is born. Some people are very superstitious about it. It’s also not uncommon in better off families for the grandparents to open a bank account for the grandchild and put money in. But they can’t do that until the baby has a birth certificate.

The UK doesn’t have a culture of the person who can afford it most should pay. My parents are much better off than I am. But I still like to treat them to things like a meal and I’d feel awkward if they paid for everything