Thank you both, I think you have found the answer for me. It’s a great help.
In the mean time I had gone back through the following few years of these records and found ‘copy … del’ and ‘copy … del’d’ used, sometimes with the old ‘and’ symbol (and I wonder if the first letter/symbol might be that) - but nothing as abbreviated as this! I assume it was similar to modern-day recorded delivery and implied the new copyholder was not present at the court.
Thanks again
Helen