In the first few weeks there is no need to bath your baby more frequently than once or twice a week, especially in the winter months, topping and tailing is acceptable and keeps your baby warmer.
When you do bath them make sure the room is warm, approximately 22 °C (room temperature) and free from draughts, that the water is at the right temperature 30 °C (tested with your elbow), and all the essentials you need are at hand, the clothing ready (if necessary warming too). Ignore the 'phone' and front door bell once you have started to bath your baby, the risk of them getting cold far outweigh the importance of the person at the door on the 'phone'.