We have Great tit eggs!!!

The great tit in my Wildlife Whisperer Discovery nest box has done a good job of hiding her eggs in the deep hair and wool and I only noticed today that there are three there! They lay one a day, so she must have started at the weekend. I went back to my side box which also has a great tit in. Again, the nest is very deep, so really difficult to tell. She may also have some! No sign in any of the blue tit nests though. I will need to keep a close eye from now on though!