How’s that going? I was pretty surprised when I’d downloaded my data to see they hadn’t given me so much of what I know they have...

Pretty badly to be honest[1], seems like their local data protection authority is Ireland, who like to sit on their hands. That's partly why I'm waiting.

[1] - http://www.europe-v-facebook.org/EN/Get_your_Data_/get_your_...

Are you simply wanting to see your data, or do you want it deleted? After GDPR comes in I’m going to be looking into the latter.

Both. I want to:

1. See what data they hold.

2. Have it deleted.

3. Formally withdraw consent to the collection of future data.

4. Follow it up in 6-12 months with a subject access request.

I have heard that the facebook "download your data" feature on the website does not give you all the personal data they hold. For that you need to contact them directly (maybe a letter), and quote data protection law to them.