We have a bird box attached to our fence which was inhabited...

We have a bird box attached to our fence which was inhabited by some Blue Tits. I’d wake up in the morning and watch them fly in and out building their nest. A few weeks ago, something spooked them and they haven’t been back. I saw a different Blue Tit checking out the nest so I figured I’d need to clear it out so that it can be reused by other birds. Found 6 abandoned eggs. Genuinely gutted. I…