No, the ba.com mobile service uses the browser that is included on many mobile phones. You should not need an additional download. There are however ba.com mobile applications available for iPhone, BlackBerry and Android phones, available in their app stores.
There are many useful features to make your travel easier. You can check real-time arrivals and departure information, use online check-in, select you seat, and even check your Executive Club details.
You will need the British Airways app, if available for your phone, to use the mobile boarding pass.
The British Airways apps allow a more personalised experience, designed around what you will need to know at each stage of your journey. We recommend that iPhone, BlackBerry and Android users download the British Airways app from their mobile phones app store.