Our 21 month old Daughter has had a lot of changes lately. We have moved house, we have had a new baby (boy), and she has started family day care. For a couple of days on the run she has thrown the most spectacular wobblers!! The last one ending up with her throwing herself on the tiled floor and splitting her lip open. This tantrum was full on for approximately an hour!! This was a very frightening experience for my husband and myself and were wondering how best to deal with situation if and when it next occurs. If there is anybody out there with any tips or advice to help us deal with this situation it would be very much appreciated.

Read the book, Raising Our Children, Raising Ourselves. It will answer all your questions and it has a fabulous chapter on tantrums.

In short, your goal is to understand why she is so frustrated and to help her. We treat children different than adults and we shouldn't. If an adult was doing an adult tantrum (sobing, raging) we would HELP.

My personal feeling from what you are saying is that your daughter is feeling that she has lost everything.
Her home, her place in your arms, and not also going to daycare while you stay home with the baby? That's too much. The way she probably feels it is: The baby came and she is sent away. That's enough of a reason to scream day and night. Just my thoughts. Read that book.