Thanks [mention]catmeows[/mention],
This is a table I produced in Google Sheets which holds the addresses for each of the characters in VRAM and the addresses to VPOKE your UDG Data into, and the associated Colour addresses too.
https://docs.google.com/spreadsheets/d/ ... sp=sharing
Feel free to ask any questions. I'm in the process of converting a simple Spectrum game and will post the code here too.