Your new valve should have the following:-
O = Orange wire – common contact connected to permanent live.
G = Grey wire – normally open contact (pump & boiler)
W = White wire – normally closed contact (not used)
BR = Brown wire (switched live from timeclock/stat
B = Blue wire (Neutral)
Your old valve looks like it had a one way auxiliary switch instead of two way as the new one is. Make sure you connector block & tape up the white wire as it will be live when the valve is not energised.