Emma,
This is all what I had and what nurses need to do before any surgery. As Andrew said if you are over 40 or have a cardiac history they will need an ECG. This is to make sure that your heart is fit and able to take an anaesthetic. They will also make sure that you haven't had any problems with anaesthetic before or any allergies.
Your past medical history is very important, a history of asthma especially if you have been to ICU, any lung or breathing problems, smoking or an ex smoker etc. This is all to make sure that you will be ok to have an anaesthetic.
They will also need your contact details and who they could contact in case of an emergency. This is not to worry you, but a standard procedure which all inpatients need to provide.
There is a lot of time for you to ask questions and sign the consent form. Please don't feel pressurised into doing anything or rushing through it as you will have time. You need to understand what it is that you are going to have done and be able to give informed consent.
Best of luck with it!! Hehe just a note ... but most people find that their blood pressure and heart rate goes a lot higher when in hospital!! Even health professionals have the same problem so please don't panic!!!!
Take care!!