Does sixty at Heathrow like to push insurance hard ?

Generally they will push, if you don't want to buy, you can just reject directly.

Car rental companies will always promote insurance and upgrade services

When I rented it in January this year, the staff asked me only one question, and I said I had bought full insurance, and that was it.

I didn't push for it. Without waiting for him to express anything, I told him I didn't need any other insurance, and the oil was also full when I picked it up and returned it. Then there was no insurance on the receipt he printed out. You can just look at the money amount.