You are downloading the Met Office XAP file v220.127.116.11 for Windows Phone. Met Office is a free and useful News & Weather app: Get your forecasts on the go with the official Met Office weather applicationAs the UK’s national meteorological service, the Met Office ... You can now download the offline XAP file to install & try it.
Download Locations for Met Office 18.104.22.168 XAP file
Important Notice: Now Due To Unspecified Limitations, You Can Not Use The Offline XAP File To Install It Any More.
To try to install it manually from an SD card, you should choose one of the server location above to get the offline Met Office XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.