The Electoral Commission informs me that the confirmation dry run involved matching all entries on the electoral registers against the Department for Work and Pensions (DWP) Customer Information System database. Entries would be marked as green if they matched with DWP, amber if they were a partial match or red if there was no match.
Results for all wards are available on the Commission's website here:
The ward results for Wandsworth were as follows:
|Ward||Green matches||Amber matches||Red matches|
|Roehampton and Putney Heath||63.5||3.2||33.3|
|St Mary's Park||58.5||5.7||35.8|