Hello, think you for your question. My name is Tony and I can assist you with this.
Do you know whether the employer has a reason for doing this? If so, what do you think it is?
Okay. How long have you worked there for?
Okay. An employer than snoops and takes an unkeen interest in your personal effects might be held to have breached the implied term in your contract of employment relating to "mutual trust and confidence", which means you both have to trust and work sensibly with each other.
If substantiated, this would allow you to resign and claim constructive dismissal. But, you do not have the usual 2 year qualifying period to claim unfair dimissal.
So you would, at best, likely only be entitled to your notice pay.
What does your contract say about the entitlement to the bonus? Do you need to be employed for certain times etc? Because you need to be careful about this.
Are you there?