Should I disclose my situation? (UK)

I started a job as an Account Manager for a tech company in January 2024, and I initially loved it. However, after just six months, things took a turn when my territory was eliminated in July 2024.

Around that time, I was approached by a small startup and decided to explore the opportunity. From our first conversation, I was impressed—it seemed like a fantastic company with a great mission, solid pay, and an appealing schedule. I was thrilled and made the switch.

However, I quickly realized that the on-target earnings (OTE) were far from attainable, the schedule I was told about did not align with my contract, and the job wasn’t nearly as exciting as it sounded. I realize now that I made a mistake!

I’m planning to leave this company soon, which means I will have seven months of experience at my first job and only two months at my current position.

I’ve been actively interviewing with several new companies, and I’m in the final stages with three of them. I haven’t mentioned that I’m currently employed full-time, considering I’ve only been with this company for a short time.

Could they find out? Is there a risk I could lose an offer if they do? What are the chances that this could backfire on me?

I’m feeling really anxious about this situation!