Researching the customer - The Moscow Rules?

Whilst some NAMs may feel the need to disguise their real intent (and appearance) on customer premises, despite having no agenda, these spying tips may help in piecing together the customer  profile.

The Moscow Rules:
1   Assume nothing
2   Never go against your gut
3   Everyone is potentially under opposition control
4   Don't look back; you are never completely alone
5   Go with the flow, blend in
6   Vary your pattern and stay within your cover
7   Lull them into a sense of complacency
8   Don't harass the opposition
9   Pick the time and place for action
10 Keep your options open
Source

Alternatively, why not spend an online pound in Companies House and let the latest published Annual Report provide some focus, and the bulk of the jigsaw, leaving eyes and ears to fill in the real gaps…?