Yes, the Government has given permission for christenings to go ahead now, and your vicar will want to make your child's christening day beautiful and special, as well as safe for you, your family and friends, and church staff. The church may still therefore have some restrictions in place, such as a maximum capacity for that particular church, or some social distancing measures or masks, based on a risk assessment. If you have any worries about the safety of your child's christening, talking it all through together with the vicar in advance will help you understand the risks, so you know what to expect, and then agree on the best way forward on the day.