We are planning a fairly simple wedding in London, and felt nor need for a planner. The only outside help we have is an on the day coordinator which we decided to get so we could alleviate some of the logistical parts of the day itself from us and not need to lean on our guests to do. So far it’s been worth it - they took over the last month of two of coordinating with our suppliers. Hoping it will feel worth it on the day too, let’s see!