My car is three years old in a few days time so I suppose I need to get it MOT'd. However should I have heard something from DVLA or is it totally up to me to remember that it is due?

Down to you to remember.

Phil

Na just keep driving about, you will find out sooner than later

You can get mobile phone reminders I believe, bit of a money making scheme if you ask me , the last MOT certs used to have a small sticker on them so you could stick it somewhere ( no comments please) , but the new MOT certs is just a bit of A4.

Do it the old fashioned way and check yourself now and again

What's your ground clearance like, Mike? Beware the rolling road!