Police catched me switch to TikTok but did not pull over (London)

Hi all,

Tbh I am freaking out. I know I am stupid😓.

I am driving to buy something I got my Google map on my phone ( my phone is on holder) so I did not use my phone but when red light. I switched from Google map to TikTok and police car ( no light no sound) asked me to lower the windshield and told me you can’t do it. And they told me I got your reg we will send you letter and run away without pull me over.

I had my license only 5 months and now I am freaking out.

Please advise what is the chance police only warned me this time 🥹🥹