Due to a technical problem, we had to take it out of the DMS catalog. But the map files are still available for download.
You can copy the OS Streetview files from your PC to the iOS device via itunes file sharing. Once you have it open in the iphone, you can add new areas to it.
Or you can click this link on your iphone to open a fresh copy:memmap://open?http://w2.memory-map.com/ ... ssv_gb.qct
Note, if you are using the Free version of the app, you will need to purchase a "Classic map compatibility" license to view the OS Streetview.