ok So I googled it, a few decent hits are:
- http://www.howtogeek.com/140576/how-to-edit-the-hosts-file-on-android-and-block-web-sites/ Explains it well enough, create file in notepad - using ABD, copy the file. But does not give any usefull example blocker addresses to get you started.
- http://www.hongkiat.com/blog/blocking-ads-in-android/ Provides a way to do this using just your Android and Notepad on the PC , and some artfull copying + moving to avoid needing ABD. It also gives us 3 example hosts files to get started.
So far it's not blocking much, but it's a start.