Bit more advice...
Never cook a steak that has been frozen & defrosted as it tastes rubbery. If you're going to spend decent money on a decent steak go to the butchers and dont buy in a pack from a supermarket. These are ok for normal meals but if you want to make steak for a special occasion go to a proper butchers, believe me you can taste the difference. I'm sure Urchin's OH bemoans the state of british steaks too as much as my OH
Local butchers will also cut the piece nice and fat for you, ask for at least an inch thick then all I do with ours is put the grill on full belt and heat the grill rack up too then cover both sides with some ground black pepper then put the steaks on the HOT grill for 30 seconds, turn over and do the same as this will seal the meat then cook as per your preference.