List of tips:
Ways to demonstrate "passion":
Books you've read
Related hobbies
DIY projects (YouTube is a great resource)
Do your own experiments/investigations (Complete what you said there was additional scope for investigation/experimentation in your EE)
Internships
Regional/National/International competitions in science/debate
Summer camps at universities of choice
Open days for your university of choice
Start a YouTube channel
(if you have interviews) write the personal statement knowing that you will be interviewed about it
Make certain omissions so that you have things to talk about in your interview
Do not exaggerate / deviate from the truth as it could get you in trouble in the interview
You can obtain example personal statements of DIS alumni by clicking on the following button and requesting access