Hi
Two possibilities spring to mind.
1 A1 security were a well known instalation company in the NW and fitted
many types of alarm rebadged to A1.
2 A1 manufacturers made the Omnicrom range of panels see link :-
http://www.ukpanels.com/A1%20Omnicron.html

If not A1 panel then need more info to identify any chance of a picture?

You say it is brand new in box.
Have you opened the panel? most have paperwork inside.
HTH
CJ