A tied agent of the bank where I took out my mortgage phoned me when I had applied for a mortgage & basically told me to come in & apply for my mortgage protection. When I told her I was looking at options with a broker, she said, "You don't want to be messing around with mortgage protection insurance" and basically insinuated that I needed to get it sorted out (with her) or else could have trouble getting the mortgage.
Since they're not allowed to insist you buy it from them, I think they try every trick in the book. Shop around. You can get mortgage protection insurance quite cheap.