What to do if my wife takes my daughter out of country without my knowledge??

My wife, a lawyer herself, and I have been married for 11 years and have a 9-year-old daughter. We separated a few months ago without any legal proceedings initiated. The reason for our separation is my wife's infidelity, which has been ongoing for the past 6 years. I recently discovered evidence, an audio recording, of her engaging in explicit conversations with someone else. When confronted, she denied it and responded with verbal and physical abuse. As a result, I left our home and am currently staying with my parents. I have learned that my wife is in the process of obtaining passports for herself and our daughter, and I suspect she is planning to relocate to the UK. She has been in contact with an immigration agency regarding this move, and her sister and brother-in-law reside in the UK. Despite my inquiries, she has denied any plans to leave the country. However, upon further investigation, I confirmed her dealings with the immigration agency. Additionally, I have taken preemptive measures by contacting our daughter's school and requesting that they refrain from issuing a Transfer Certificate. Given this situation, I am seeking advice on what further steps I should take. Moreover, I am concerned about the legal options available to me if my wife decides to take our daughter abroad without my consent