# AddressBase Islands October 2025 – Epoch 122

## Record counts

| Product                     | Full Supply Record Count | Change-Only Update Record Count |
| --------------------------- | ------------------------ | ------------------------------- |
| AddressBase Plus Islands    | 1 166 805                | 5 566                           |
| AddressBase Premium Islands | See rows below           | See rows below                  |
| Street                      | 49 054                   | 120                             |
| Street Descriptor           | 49 054                   | 31                              |
| BLPU                        | 1 246 270                | 5 481                           |
| Classification              | 1 246 270                | 2 719                           |
| LPI                         | 1 256 135                | 3 659                           |
| Organisation                | 38 878                   | 71                              |
| Delivery Point Address      | 983 424                  | 2 446                           |
| Application Cross Ref.      | 1 311 306                | 2 592                           |
| Successor                   | 0                        | 0                               |

## Changed records

If you receive a Change-Only Update (COU) supply for your AddressBase Islands product, you will receive Insert, Update and Delete records within the supplied file. The following tables detail the count of these records.

### AddressBase Plus Islands

| Change Type | Count |
| ----------- | ----- |
| Inserts     | 1 114 |
| Updates     | 4 218 |
| Deletes     | 234   |

### AddressBase Premium Islands

| AddressBase Premium Islands Table | Inserts | Updates | Deletes |
| --------------------------------- | ------- | ------- | ------- |
| Street                            | 30      | 90      | 0       |
| Street Descriptor                 | 30      | 1       | 0       |
| BLPU                              | 1 673   | 3 626   | 182     |
| Classification                    | 1 673   | 864     | 182     |
| LPI                               | 1 680   | 1 797   | 182     |
| Organisation                      | 11      | 13      | 47      |
| Delivery Point Address            | 917     | 1 326   | 203     |
| Application Cross Ref.            | 1 647   | 634     | 311     |
| Successor                         | 0       | 0       | 0       |

It is important that COUs are processed with Deletes first, then Inserts and Updates. This is to ensure that updates are applied in the correct order. Guidance on this can be found in the '[Working with COU data' page in the AddressBase Core Getting Started Guide](/os-downloads/products/addresses-and-names-portfolio/addressbase-core/addressbase-core-getting-started-guide/working-with-cou-data.md).

## Source data currency

The following information relates to the currency of the source data used in the creation of Epoch 122:

| Data Source                | Date              |
| -------------------------- | ----------------- |
| Pointer (Northern Ireland) | 10 September 2025 |
| DigiMap (Channel Islands)  | 11 September 2025 |
| Isle of Man                | 11 September 2025 |
| Royal Mail PAF             | 11 September 2025 |

## Data issues

### AddressBase Plus Islands issues

Details of live and resolved data issues for AddressBase Plus Islands will be communicated on the [AddressBase Plus Islands Known Data Issues page](/os-downloads/products/addresses-and-names-portfolio/addressbase-plus-islands/addressbase-plus-islands-known-data-issues.md). This page will provide details of their impacts and updates on the expected time frame for their resolution.

### AddressBase Premium Islands issues

Details of live and resolved data issues for AddressBase Premium Islands will be communicated on the [AddressBase Premium Islands Known Data Issues page](/os-downloads/products/addresses-and-names-portfolio/addressbase-premium-islands/addressbase-premium-islands-known-data-issues.md). This page will provide details of their impacts and updates on the expected time frame for their resolution.

## Next release

The next release of AddressBase Islands products, Epoch 123, is scheduled for **27 November 2025**.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.os.uk/os-downloads/products/addresses-and-names-portfolio/addressbase-fundamentals/release-notes/addressbase-islands-october-2025-epoch-122.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.