The "Download Now" link directs you to the iTunes App Store, where you must continue the download process. You must have iTunes installed in order to open the link, and you must have an active iTunes account to download the application. This download may not be available in some countries.
From Landmark Information Group:
Ever wondered what your favourite UK birth location looked like during the past century? Want a decorative historical map of your UK place of berth? Now you can access Landmarks historical maps repository on your iPhone or iPod Touch. Landmarks historical map store includes mapping from the early 1800s in varying detail layers covering most of the UK. Simply choose your location based on postcode, town or GPS location, and then select your preferred mapping layer/year to see your preferred decorative map. Take it one step further, head over to http://www.old-maps.co.uk/, and purchase any map as either a downloadable PDF, or a print with or without frame delivered to your door.
In app purchasing of quality maps. Panning on mapping layers. A number of bug fixes. We would like to improve your application experience, however, we can not address issues without your feedback. If you are having problems with this application then please supply us details & we will endeavor to address the problems: IphoneApps@landmark-information.co.uk