First Antenatal UK

Heather
I need some advice from any UK mummies out there. I have my first antenatal app on Monday and I was just wondering what to expect.  
I will be 8weeks from FDLP. What I'd like to know is am I likely to be given any scans? Or even get to hear the heart beat?  I know the app will last about an hour but I don't know why.
Any info would be greatly appreciated.