Get an entire GB region for your OS GPS with one of these map bundles. For individual map tiles, please go to 'My Account' then 'My OS GPS'. Individual tiles are 25km x 25km and cost £1 each for OS Landranger 1:50k tiles or £5 each for 1:25k OS Explorer tiles, once you have used your free tiles allowance. There are discounts for tiles with less land area.
Please ensure you have registered your device before purchasing any OS GPS map tiles or regions, to ensure your purchase can be tied to the account and device