Now I know a little bit more about buses I have realised that there are two versions of the Gemini. The earlier models are just known as Gemini, and the later models (from around 2006 onwards) are known as Gemini 2. So I will use these from now on. Up until now I have just used Gemini for both types.
A frozen Tuesday morning... got Gemini 2 WVN13 on the 259 from Manor House to Caledonian Road tube station. Returning at 16.45 ish on Gemini 2 WVN8 on the 259 from Caledonian Road to Manor House.