> For the complete documentation index, see [llms.txt](https://docs.os.uk/os-downloads/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.os.uk/os-downloads/products/addresses-and-names-portfolio/addressbase-fundamentals/release-notes/addressbase-islands-march-2025-epoch-117.md).

# AddressBase Islands March 2025 – Epoch 117

## Record counts

| Product                     | Full Supply Record Count | Change-Only Update Record Count |
| --------------------------- | ------------------------ | ------------------------------- |
| AddressBase Plus Islands    | 1 154 935                | 3 461                           |
| AddressBase Premium Islands | See rows below           | See rows below                  |
| Street                      | 48 760                   | 127                             |
| Street Descriptor           | 48 760                   | 49                              |
| BLPU                        | 1 239 229                | 3 933                           |
| Classification              | 1 239 229                | 2 023                           |
| LPI                         | 1 249 018                | 2 597                           |
| Organisation                | 38 742                   | 258                             |
| Delivery Point Address      | 966 474                  | 1 129                           |
| Application Cross Ref.      | 1 305 033                | 1 692                           |
| 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     | 1 039 |
| Updates     | 2 234 |
| Deletes     | 188   |

### AddressBase Premium Islands

| AddressBase Premium Islands Table | Inserts | Updates | Deletes |
| --------------------------------- | ------- | ------- | ------- |
| Street                            | 35      | 90      | 2       |
| Street Descriptor                 | 35      | 12      | 2       |
| BLPU                              | 1 124   | 2 684   | 125     |
| Classification                    | 1 124   | 774     | 125     |
| LPI                               | 1 193   | 1 279   | 125     |
| Organisation                      | 58      | 57      | 143     |
| Delivery Point Address            | 654     | 325     | 150     |
| Application Cross Ref.            | 1 114   | 385     | 193     |
| 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 117:

| Data Source                | Date             |
| -------------------------- | ---------------- |
| Pointer (Northern Ireland) | 13 February 2025 |
| DigiMap (Channel Islands)  | 13 February 2025 |
| Isle of Man                | 13 February 2025 |
| Royal Mail PAF             | 13 February 2025 |

## Data issues

### AddressBase Plus Islands issues

There are no reported issues in this release of AddressBase Plus Islands.

### AddressBase Premium Islands issues

**Affected output formats: CSV and GML**

* **Street incorrect coordinates** – There are two Streets which have incorrect start or end coordinates of 000000. The unique identifiers can be provided upon request through your OS Relationship Manager.

## Next release

The next release of AddressBase Islands products, Epoch 118, is scheduled for 01 May 2025.


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