You've created your own dataset using OS data licensed to you under the Public Sector Geospatial Agreement (PSGA), which you would like to publish on data.gov.uk.
Prior to submitting your notification form, you need to be sure that your derived dataset meets our publishing criteria.
The best “general rule” test we recommend is when you consider your dataset, do you just see an OS dataset with a few tweaks, or do you see a dataset that feels like yours? If your dataset is of the latter type, it is more likely to meet the presumption to publish criteria below but you will still need to check before submitting your notification.